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Hoya Australis Lisa: Complete Grow & Care Guide

My obsession with Hoya compels me to purchase one whenever I encounter a new variety.

Hoya australis Lisa is my personal favorite among its different varieties. It is a plant of beauty and admiration for its splashy light green leaves with a colorful tone.

Generally, Hoya australis Lisa prefers 8-10 hours of bright indirect light, high humidity above 70%, and warm temperature ranging between 18-24 degrees Celsius (65 – 75F). Additionally, it requires monthly feeding and re-potting once in 2-3 years. 

Hoya Australis 'Lisa'
Hoya australis Lisa (Source: Etsy)

Want to learn more about Hoya australis Lisa? Continue reading the article.

You will get all of your answers regarding their care tips, problems, solutions, preventive measures, and ways to multiply them.

Overview of Hoya Australis Lisa

Hoya australis Lisa is a variegated species of Hoya australis that offers tropical vibes with its splashy yellow, and cream variegation in the lighter green background.

The species  ‘Australis’ was first spotted by Europeans in 1770 on the northern coast of Australia.

You might have already guessed where its species name ‘Australis’ comes from – ­­obviously, its place of discovery.

Hoya Australis 'Lisa'
Hoya australis Lisa (Source: Etsy)

In the natural environment, they grow along the rocky surface of East Asia and the Australian rainforest.

Unlike other types of Hoya, australis Lisa does not trail down. Instead, they climb, weaving their stems over one another.

Let us look more into the Hoya australis Lisa.

Botanical NameHoya Australis Lisa
Common NameWax Plant Lisa, Hoya Lisa, Variegated Hoya Australis
OriginNortheast coast of Australia
Family Apocynaceae
Plant TypeSemi-succulent
Growth Zone USDA hardiness zones 10-11
Growth SizeIndoor (3-4 feet)
Outdoor (upto 10 feet)
Grown For Mainly foliage but also flowers
Foliage Type Succulent-like thick, oval-shaped waxy, fleshy, and glossy leaves
Blooms White, red-tinged booms in clusters that has sweet aroma
Toxicity Non-toxic to humans and animals
Care Level Easy

Did you know that Hoya has over 200 different species? The Australian Native Plants Society asserts that among 200 varieties of Hoya 7 different varieties belong to australis.

Hoya Australis Lisa – Plant on Sale

First and foremost, Hoya is a lovely plant with spectacular leaves. But wait, the aroma of the flower is truly aromatic and mind-blowing.

So, if you are someone who adores plant fragrances, Hoya australis Lisa is a must-buy plant.

But, a question might creep into your head; where to buy Hoya australis Lisa? I am here to guide you.

Here is a list of portals to get Hoya australis Lisa.

Places to Buy Specifications
EtsyRanges from $13-$40 depending upon the size
In succulent loveThe plant is in sale for $16.99
Pistils NurseryYou will get the plant in a 6 inch pot for $15
ebayThe price ranges form about $10-128 depending on the size
AmazonYou will get 3 inch plant potted in 4 inch pot for $15

Hoya Australis Lisa: Ultimate Grow and Care Guide

Hoyas are a perfect plant, even if you are a newbie or a plant parent, as they are very easy to take care of.

Hoya australis Lisa can tolerate slight neglect. However, constant ignorance is not suitable for Hoya as any other plant.

Although the plant is easy to care for, it has specific care regimens to be followed. Ensure you provide it with all primary care to see them thrive.

Here is a table containing the detailed information about the care requirements for the plant.

Parameters Favorable Conditions
Sunlight 8-10 hours of dappled sunlight
WaterOnce in 8-10 days in summer. Reduce the frequency to half during winter
Temperature65 – 75 degrees F
HumidityAbove 70% of the relative humidity
Soil TypeLight, well-draining soil with a pH of 6.1 to 7.5 
Fertilization Nitrogen and Phosphorous rich once a month
Pruning Rare pruning, once in 2 years
Pot About 4-5 inches terracotta pot
Repotting Once in 2-3 years
Propagation Via Stem cuttings and seed germination
Common Pests Mealybugs, Whiteflies, and Aphids
Horticultural DiseasesRoot rot, Botrytis blight, Sooty molds

1. Adequate Diffused Light and Proper Location

Hoya australis Lisa is an epiphytic tropical plant that climbs on rocky surfaces and tress.

Since the plant grows under the shades of trees, it is prone to harsh sunlight but enjoys brighter light.

Provide your Hoya australis Lisa with 8-10 hours of dappled sunlight for optimum growth.

Direct sunlight is diffused by using glass in this illustration
Direct sunlight is diffused by using glass in this illustration (Source: Royal Brinkman)

When it comes to Hoya, remember that neither excessive harsh sunlight nor low light is good for them.

Insufficient Light Extreme Harsh Light
Loss of variegation, discoloration, and bleached foliageLeaves turn dry and crispy
Leggy, dull, and stunted growth. Lager gaps between nodes. Brown or yellow patches along the edges and leaves
The leaves and stems droops and wilts and in severe case fall off. Excessive moisture loss from leaves which results curling and falling off leaves
A low photosynthesis rate causes less energy production hampering the overall functioningThe plants droops and wilts suddenly

Proper Locations for Hoya Australis Lisa

  • You can keep the plant outdoors in USDA hardiness zones 10-11, but make sure it gets 30-40% of total light.
  • A place receiving 70-80% of the total light intensity is sufficient for an indoor environment.
  • Eastern facing window is the best spot for your plant as it reflects morning sunlight.
  • A southern or western facing window also works. But keep them out of direct sunlight throughout the afternoon.
  • Place your plant 1-5 feet from the window.
Illustration showing plant in an optimal sunlight and water Vs in extreme sunlight and watering conditions
Illustration showing the plant in optimal and extreme sunlight and water. (Source: Stocklib)

Tips to Provide Ideal Lighting Conditions

  • To protect the plants from the intense light, use a light curtain.
  • Rotate the plant once in 10-15 days to obtain balanced growth.
  • Avoid sunny locations for your plant.
  • Provide 1-2 hours of direct morning light or afternoon shades.
  • Moving plants from brighter to lower light is vulnerable. Thus, avoid frequent moving of the plant.
  • Use artificial light if your place has low light intensity.

Pro Tip: Variegated species thrive best in bright indirect sunlight. If your Hoya australis Lisa is not variegated, introduce it to a brighter location.

When the light is low, the plant involves in generating more chlorophyll to trap maximum light from the low light environment. It causes partial to complete loss of variegation.

How to Choose the Best Artificial Light for Hoya Australis Lisa?

The most important thing to remember while choosing artificial light is that it must be full spectrum.

Since Hoya australis Lisa is a flowering Hoya species, it requires a red and blue spectrum.

A red spectrum of light is essential for plants to produce flowers, and a blue range is necessary for vegetative growth.

It is ideal to use full-spectrum LED light for Hoyas.

Provide your Hoyas with 7-10 hours of artificial light. Also, keep them within 20-30 cm from the light source.

Generally, light intensity is low during winter. Hence, I recommend using artificial light for your plant to meet the optimal light condition.

Plants under artificial/ grow light
Plants under grow light (Source: Amazon)

Additional Insight: Provide your Hoya with artificial light of about 500 to 1,000 foot-candle range, or 15 or more watts per square foot of growing area.

2. Moderate Watering

Although Hoyas are tropical plants, they have succulent like leaves. So, what does it mean?

Well, their thick leaves store water, making them resistant to drought and simple over-watering problems.

The major watering issue in Hoyas is over-watering rather than under-watering.

Keep the soil most and ensure that the top 25-30% of the ground dries out before watering. Next, important thing is to water them thoroughly whenever you water them.

Water your Hoya australis Lisa once every 8-10 days in the summer. Decrease the rate to half during the winter as the soil takes longer to dry out.

Watering the plant
Watering the plant (Source: Pixabay)

Signs of Watering Issue

The most common problem people face for Hoyas is the watering issues.

As, most signs of over-watering and under-watering are similar, confusing the plant parents even more.

Generally, your over-watered Hoyas australis Lisa leaves will look limp and mushy. Whereas, under-watered ones will look dry, crispy, and shrinking.

Other common symptoms of watering issues include yellowing, browning, drooping, and wilting of foliage.

Besides, the plant will exhibit sluggish and stunted growth and bleached foliage.

Overwatering the Snake Plant
Over-Watering the Snake Plant (Source: tenor)

Tips to Water Hoya Australis Lisa Properly

  • Use either tepid or room temperature water for your plant.
  • Use a moisture meter for your plants to measure soil moisture and to know when to water your plant.
  • Insert a dry stick 2-3 inches deep in the soil, and water the plant if it comes out dry. Otherwise, leave the soil to dry for a couple of days.
  • Hoyas are prone to excessive water salts. Hence, avoid using high salt content water.
  • You can also use a self-watering pot for your plant.
  • Always use either room temperature or tepid water while watering them.

3. Moderate to Warm Temperature

Based on where Hoya australis Lisa originated from, it adores warm temperatures.

Consider maintaining their temperature between 65 – 75o F for proper growth.

However, a temperature range between 55 – 60o F is tolerable for Hoya australis Lisa during winter.

But, be mindful that the temperature should not drop below 50o F.

Soil temperature range
Appropriate soil temperature range (Source: University of British Columbia)

What Effect does Extreme Heat have on Hoya Australis’ Lisa?

The first important care tip for Hoya is to keep them at a constant warm temperature. Constantly fluctuating temperature makes them difficult to adapt to a particular environment.

It stresses the plant and might also kill them sometimes. Protect your Hoya australis from temperature extremities.

The signs of extreme heat in Hoya include yellowing, drooping, wilting, curling, and browning leaves.

Whereas excessively hot temperatures cause severe moisture loss from leaves through transpiration.

Temperature stress in Plant
Temperature stress in Plant (Source: Science Direct)

Anything below 50o F causes freezing of cellular water, which causes tension in the cells. Cold also disrupts the regular physiological functioning of the plant.

Tips to Maintain Ideal Temperature for Hoya Australis Lisa

  • You can balance moisture loss from leaves caused by high temperature by increasing humidity around the plant.
  • You need to avoid drafty areas, heating and cooling vents like a radiator, heater, etc.
  • Never keep the plant outdoors during frosty nights.
  • To prevent temperature loss from the soil during winter, insulate the top layer of the soil using dried grass, leaves, straw, etc.
  • Similarly, you can use Frost blankets and heating pads to avoid cold stress.

Did you know artificial grow lights also help in maintaining temperature? A LED light of about 500 w produces about 1,877 heat BTU per hour.

4. Moderate to High Humidity

Hoya australis Lisa comes from the tropical and sub-tropical region, where it prefers warm temperatures and high humidity all year.

Hence, maintaining the humidity above 70% is considered best for Hoya australis Lisa.

They can also survive in a 40-60% humidity range, which is typical indoor humidity.

On the other hand, low humidity causes leaf yellowing, drooping, falling, and curling.

Humidity effect in plant
Humidity effect in plants (Source: North Carolina Climate Office)

Tips to Maintain High Humidity

  • Consider misting the leaves once in 3-4 days.
  • Group your house plants. It helps to increase the humidity through natural precipitation.
  • Next, you can place a wet pebble tray underneath the pot. It maintains air moisture as soon as the water in the tray evaporates.
  • Alternatively, you can use an electric humidifier to increase humidity artificially.
  • Likewise, you can place your plant in a humid area like the kitchen or bathroom.
Illustrations of plants under grow light with a humidifier
Illustrations of plants under grow light with a humidifier (Source: Stocklib)

5. Well-Draining Soil

Hoya australis Lisa possesses semi-succulent characteristics and thus requires a potting mix that drains water quickly.

Hoya australis Lisa thrives in a well-balanced potting mix that quickly drains excess water while holding optimal hydration and has a mildly acidic, neutral soil pH of 6.1 to 7.5.

soil
Loose And Well Draining Soil ( Source: Pexels)

Hoya needs highly aerated soil that lets air circulate between roots. If the soil is not well-draining, it occupies the tiny air pockets present in the soil.

Ultimately, it chokes the roots and increases anaerobic activities in a lack of oxygen.

You can prepare your mix at home for your Hoya australis Lisa. Here is the recipe.

  • 1 part of the orchid mix
  • 1 part of perlite
  • 1/2 part of peat moss
  • 1/3 part of organic compost

Note: You can also add barks, charcoal, rice husk, dried leaves, and grass to make the soil light and porous.

Alternatively, you can buy commercial mixes ideal for your Hoya australis Lisa directly from amazon.

6. Nitrogen and Phosphorous Rich Fertilizer

Hoya australis Lisa is not a heavy feeder, unlike other plants. But a slight nutritional boost is always beneficial for plants, right?

Consider fertilizing your Hoya once a month during spring and summer with slow relating fertilizer.

A balanced fertilizer with 10-10-10 or a blooming fertilizer rich in phosphorous like 7-9-5 is ideal for Hoya australis Lisa.

Hand of a man putting fertilizer to a plant
Feeding the plant (Source: Stocklib)

I use either an organic compost biweekly or high-potassium liquid fertilizer once a month for my Hoyas.

Besides, if you see stunted or dull growth in your plant, you can encourage the growth rate with some nutrition solutions.

Take about 5ml of nutrition mixed in 1 liter of water and spray it over the plant. It will help plants to sprout new and healthy foliage.

Tips to Fertilize Hoya Australis Lisa Properly

  • Fertilize the plant only during the growing season. Avoid fertilization during winter.
  • Always dilute the strength to 1/4th or half before using them.
  • Water the plant before fertilizing them as it enhances better nutrition absorption.
  • Avoid spraying fertilizer on foliage and stems. Apply it only to the soil.

If you are searching for commercial food, here are a few fertilizers you can use for your Hoya australis Lisa.

Avoid both under fertilization and over-fertilization as both can be detrimental to your Hoyas.

7. Potting and Re-potting

Hoya australis Lisa is a slow to moderate grower. So, you do not need a large pot for Hoyas.

For Hoya australis Lisa, a 4-5 inches pot works well. Or, a pot 2 inches wider in diameter than the root ball can be used.

While choosing the pot material, choose either terracotta or a pot made of coconut husk.

Talking about the re-potting requirement, I re-pot them once in 2-3 years, and it works perfectly for me.

Woman potting and repotting plants
Women potting and repotting plants (Source: Pexels)

Generally, when your plant requires re-potting, it shows signs like the roots coming out of the drainage holes and are highly bound.

Besides, it also shows other visible signs like yellowing, dropping, limping of foliage, and stunted growth.

Pro Tip: If your Hoya australis Lisa has root rot or the potting mix is old, compacted, and nutritionally depleted, consider re-potting it.

Tips to Re-pot Hoya Australis Lisa

  • Water your a few hours earlier to re-potting them. It helps in strengthening the roots for better adaptation to the new environment.
  • Prepare tools required for re-potting like clean pots, gardening trowel, fork, and sterilized pruning shears.
  • Gently remove the plant from the pot.
  • At this point, you can prune the dead and damaged shoots and roots.
  • Now, fill the larger clean pot with soil mix. Place your plant to it and fill the space with fresh potting mix.
  • Afterward, water it thoroughly and leave it in a conducive environment for better adaptation.

Pro Tip: The plant might show signs of stress immediately after re-potting due to transplant shock.  You need not worry as it will revive naturally after successful adaptation.

8. Rare Pruning

I hate to tell you this, but your Hoya australis Lisa may need to be pruned. However, the decision to prune it or not is totally up to you.

As the plant is a moderate grower, you need not prune them often. However, trimming off the axis helps in enhancing side growth, promoting bushier foliage.

Besides, pruning also enhances new healthy growth and helps solve the problem of stunted growth.

I generally prune my Hoya australis Lisa once every two years in the later months of fall.

Avoid pruning the plant when it is actively growing. It pushes the growth back.

Pruning Basics
Pruning Basics (Source: University of Kentucky)

Next, always use sterilized pruning shears while pruning. And cut off dead, damaged foliage and stems at first.

Also, most importantly, do not over-prune your plant (only 20% at a time) as it might stress the plant.

Point To Note: Avoid pruning at the mark of the spring, as you might cut off buds, sprouts, or flowering points.

Toxicity of Hoya Australis Lisa

Hello, Hoya lovers. Hoya australis Lisa is non-toxic to both humans and pets.

So, if you are a Hoya lover, you can enjoy the warmth of the plant without harming pets and children.

However, be safe from the plant’s milky sap as it might cause skin irritation, especially if you have sensitive skin.

A plant parent with his pet dog
A plant parent with his pet dog (Source: Unsplash)

Features and Growth Rate of Hoya Australis Lisa

The low-maintenance quality of Hoya australis Lisa and its attractive variegated leaves and brilliant sweet-scented blooms make it a popular plant.

It can vine up to about 4-10 meters in the wild. While growing in a closed space, you can expect it t grow about 3-4 feet in length.

Hoya Australis Lisa plant in a black planter
Hoya australis Lisa plant (Source: Puritree Earth)

In its natural habitat, it grows rocky surface of the rainforest, where it climbs upward, holding the grip of anything that comes in contact.

A moss pole would be ideal for your plant. You can, however, hang it from a hanging basket to create a cascading effect.

They are moderate to fast, growers, when grown in a favorable environment.

1. Foliage Type

Hoya australis Lisa has succulent-like thick, fleshy, and glossy leaves. Its oval-shaped waxy foliage shines when light falls on it.

Generally, the matured or older leaves are variegated with white cream color on the green surface. In contrast, the newer foliage is red-hued that turns green on maturity.

A matured leaf of Hoya australis Lisa is about  3–6 cm long and 2–5 cm wide.

Hoya Australis 'Lisa'
Hoya australis Lisa (Source: Etsy)

If the foliage of your Hoya australis Lisa is not variegated correctly, it might be facing lighting issues. Fix your light to resolve the problem.

2. Flowering Habits

Hoya australis Lisa is appreciated for its delicate scent, which instantly relaxes the senses.

It produces white, red-tinged booms in clusters of 40 on a long pedicel (stalk) and grows up to 3 inches large in diameter.

The blooms consist of reddish-purple coronas and red marks at the base of each petal.

Interestingly, its flower can reach about 10 cm or 4 inches extensive if grown properly.

The species generally starts producing flowers after the last winter and spring, and summer.

Hoya Australis 'Lisa' flower
Hoya australis Lisa Flower (Source: Hoya Store Australia)

Besides, if you want to feel its chocolate-vanilla sweet fragrance, go nearby in the early evening; the smell is the strongest at this time.

Moreover, the flower bears long, slender seed pods about 10 cm in length. After successful pollination, the flower produces fruit and hence seeds.

Propagation Methods for Hoya Australis Lisa

Hoyas australis Lisa Replication may appear complicated, but this is not the case. Stem cuttings or seed germination are also simple ways to propagate this lovely variety.

I prefer stem propagation because it is a more straightforward, faster, and highly successful propagation method.

Furthermore, you will get the identical sister plant with the same features as your original plant if you propagate them using stem cuttings.

The best time to propagate them is in spring or summer when the plant grows rapidly.

1. Materials Required for Propagating

To propagate your Hoya australis Lisa, you will need the following materials and tools.

ItemSpecification
Pruning Shear or ScissorGet a sharp pruning shear or scissors to cut the healthy part of the plant.
Gardening glovesThese are entirely optional.
ContainerFor propagating, use small pots  2” deep like egg crates, or seed trays.
Alternatively, you can use a single pot 6-8” in size to propagate multiple cuttings.
Potting MixChoose a potting mix that retains some moisture but allows good drainage.
Alternatively, use an African violet soil mix.
Rooting PowderThe rooting hormone helps to boost root growth.
Plastic bagUse a black plastic bag to cover the newly propagated plant to retain humidity, moisture, and warmth.
Disinfectant or rubbing alcoholIt will come in handy to sterilize the tools.

2. Propagating Hoya Australis Lisa Via Stem Cuttings

Propagating through stem cutting is a simple and convenient way to grow your new plant. But you also need to know how to propagate and take care of your Hoya australis Lisa.

Here is a quick step to help you with stem cutting propagation.

Step 1: Prepare the Propagating Materials

First, prepare all materials like pruning shears, fresh potting mix, clean pot, etc., required for propagating the plant.

Step 2: Inspect the Stems

Inspect for a healthier strand of stems free from pests and disease infestation. Cut the stem using sterilized pruning shears.

Step 3 Cutting the Stem

Now, you can further divide the cuttings as per you need. However, ensure that each cutting has at least two nodes and a leaf.

The node is the starting point for your roots, be cautious when cutting the node. Making a 45-degree cut with a bigger surface area also encourages rapid roots.

Illustration of stem propagation
Plant propagation via stem cutting (Source: Biosphere Experiment)

Step 4 Promoting the Root

At this point, you can apply some cinnamon powder or rooting hormone. These ingredients help in preventing root rot while promoting rooting.

However, the step is entirely optional, but I recommend you to follow it as it increases the chance of successful propagation.

Step 5 Rooting the Cut

Now, you can propagate these cuttings. You can go for either soil propagation or water propagation.

Take a clean pot and fill it with a fresh potting mix for soil propagation. You can also use cocopeat or sphagnum moss for the filling.

Place the cuttings in the pot’s center, gently press the soil around them, and keep the soil moist.

In case of water propagation, take a transparent jar filled with fresh tap water. Then, Place the cuttings in the water and leave them in a brightly lit space.

The cuttings will likely start producing roots within 4-8 weeks.

3. Propagating Hoya Australis Lisa via Seeds Germination

Propagating Hoya australis Lisa through seed germination is the least common method, particularly among home gardeners. Expert farmers seeking a hybridized kind frequently use it.

Since all of the seeds possess different characteristics, you may not get baby plants that are 100% similar to your mother plant.

So, now, let us get straight into the steps to propagate the plant via seeds.

Seed Germination growth stages
Seed Germination Growth (Source: Dallas International University)

Step 1: Harvesting the Seed

The first step for seed germination is harvesting seeds. Honestly, harvesting seeds from the Hoya plant is not that easy.

You can buy the seeds directly from the commercial market. However, if you want to harvest your seeds, you first need to pollinate the plant.

While growing in an indoor environment, it is challenging to pollinate them. Hence, leave the plant outdoors for a day or two for pollination.

Its vibrant flower attracts butterflies and moths, which assist in pollinating the plant.

If the plant is successfully pollinated, you will seed pods in your plant. Store the harvested seed in an air-tight container as the sources are flurry and light.

Step 2: Germinating the Seed

You’re now ready to start germinating your seeds.

Transfer the mixture to a seed germination pot or a standard pot. After that, cover the mixture with damp peat moss.

Make sure the seeds aren’t more than a year old, reducing the odds of germination.

Place the seeds on top of the germinating medium. Then, spray water on it lightly and slightly vigorously to press the seeds into the peat moss.

Plant growing from seed in a pot
Plant growing from seed in a pot (Source: Pixabay)

Step 4: Plant the Seedlings

Now, wrap the medium with a plastic bag or frost blanket to create a conducive environment for them.

While germinating seeds, you need to maintain a warm temperature (between 68and 86F) and high humidity. You can use a heating pad for better results.

Generally, the seeds will start sprouting within the third to the seventh day after showing them.

Common Problems in Hoya Australis Lisa

The leaves of Hoya australis Lisa do not primarily attract pests. However, if your plant grows under scarcity, it might easily catch problems.

Check out the list below for some of the most frequent issues that your plant may encounter.

1. Pests Infestation

Pest infestation is typical for any plant parent, and Hoya australis Lisa is no exception.

Pests and diseases may be more likely if grown in unfavorable conditions. To protect your Hoya from harmful pests, always follow the care instructions.

The most common pests in Hoya australis Lisa are mealybugs, Whiteflies, and Aphids.

Common Pests Signs of Infestation
Mealy Bugs These are the sap-sucking tiny cotton-like white bumpy pests
Curling, wilting, and drooping of foliage
Aphids Grey or black-colored tiny insect on the leaf surface
White Flies White gnat insects fly around the plant
Drooping, wilting, yellowing of foliage
Stunted and dull growth

Treatment of Pests

  • First, you need to cut off all of the infected parts using sterilized pruning shears.
  • Now, apply either insecticidal soap or neem oil over the whole plant.
  • To kill pests like mealybugs, take a cotton ball dipped in isopropyl alcohol and apply it to the affected parts.
  • You can knock off these pets with a blast of soap water.
Mealy bugs
Mealybugs infestation (Source: Wikimedia Commons)

Preventive Measures

  • Always maintain a conducive environment for your Hoyas.
  • Avoid waterlogged soil and over-watering the plant.
  • Inspect the plant well before purchasing them.
  • Use commercial Aphid-free potting mix.
  • Provide a shower to the plant once a week. It helps to wash off pests and their eggs.

2. Horticultural Diseases

Here is a table containing diseases, causative agents, and symptoms in the Hoya australis Lisa.

Name of Diseases Causative | Agents Symptoms
Root Rot Phytophthora, Pythium, and Rhizoctonia sppStem, leaf margins appear yellow or brown and mushy
Roots appear dark and mushy
Sudden drooping and wilting of the plant
Botrytis BlightBotrytis cinereaCauses abnormal browning of flowers and leaves
Brown patches appear on stems and leaves

Besides the diseases mentioned above, Hoya australis Lisa might also sometimes catch sooty mold. Hoya australis Lisa flower produces nectar that causes sticky leaves.

Likewise, pets like aphids release honeydew, resulting in sooty molds on your Hoyas.

Rotted Root
Rotted Root (Source: nysbga.org)

Treatment of Diseases

  • Immediately cut all of the disease-affected parts using sterilized instruments.
  • Cut out all of the squishy sections if you have root rot. Dry it in the air before dipping it in fungicide, then re-pot it in fresh potting soil.
  • Avoid watering the plant for a couple of days in case of root rot.
  • Get rid of Botrytis Blight by spraying the plant with synthetic fungicides containing Copper captain, mancozeb, sulfur, Chlorothalonil, maneb, and thiophanate methyl.
  • You can wipe off sooty mold simply with soap water.
  • Alternatively, for sooty mold, you can spray diluted seaweed fertilizer.

Control and Preventive Measures

  • Regularly wipe off its leaves once in 10-15 days.
  • Segregate your plant from other infected plants.
  • Apply fungicide twice a year to prevent possible risk.
  • Never mist your plant at night as its moisture is a hub for disease infection.

3. Leaf Burn

When you fertilize your plant, it absorbs nutrients and leaves salt residue. Over-fertilization thus causes higher salt accumulation that causes the burning of young roots and foliage.

Growers often face leaf burn in Hoya australis Lisa.

The most prominent cause is high-temperature stress, harsh sunlight, low humidity, and over-fertilization.

Wash off salts drenching the pot in a pool of tepid water. However, if it does not help, you can use 1 gram of Osmcote 14-14-14 or Nutricote 13-13-13.

Yellow and burnt leaves of Anthurium with brown spots
Yellow wilted leaves with brown spots (Source: Stocklib)

Hoya Australis Lisa Vs. Krimson Princess

There are great similarities between Hoya australis Lisa and Hoya Krimson princess. Sometimes even the plant vendors sell them under identical or interchangeable names.

Botanically, Hoya australis Lisa is a cultivator of Hoya australis, whereas Hoya krimson princess is a cultivator of Hoya carnosa.

Hoya Krimson princesses are also known as Hoya carnosa ‘Rubra’ or Hoya carnosa variegated.

The main difference between Hoya australis Lisa and Hoya Krimson Princesses is their leaves.

Lisa has slightly round foliage, and younger leaves have a red-pinkish tone that later turns green.

Hoya-Crimson-Princess
Hoya Crimson Princess (Source: Amazon)

Similarly, Hoya Krimson Princess leaves are thin and delicate, with slightly lighter yellow variegation on lighter green leaves.

In contrast, Krimson princesses have somewhat longer, thick and waxy foliage. Likewise, they have darker green leaves and white variegation.

Frequently Asked Questions (FAQs) About Hoya Australis Lisa

Is Hoya Australis Lisa Rare?

Hoya australis Lisa is not commonly available, unlike other house plants. You might not be able to get your hand on them from local nurseries and vendors.

With its variegation on splashy green leaves, Hoya australis Lisa marks itself as a beautiful and rare species.

Why is my Hoya Australis Lisa not Blooming?

Various factors might hinder the flowering of Hoya australis Lisa. The most prominent issues are low light, untimely pruning, and lack of phosphorous.

Check the factor responsible for yours and treat them as per the solutions provided in the earlier section of the article.

Conclusion

Hoya australis Lisa is a perfect plant for both newbies and plant collectors due to its unique beauty and rarity.

Provide ample bright indirect light, warm temperature, high humidity, and adequate watering.  Given proper care, the plant will reward you with its beauty and pleasing scent.

If you have not gotten yourself, Hoya australis Lisa, what are you waiting for?

Get yourself Hoya and enjoy green beauty.

Read more about other varieties of Hoya here: LacunosaNummularioidesPolyneuraSerpensSunriseKrimson Queen

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