The verdure and fragrant flowers of Hoya Nummularioides become apparent with a proper nutrient boost and ideal care.
Learn the complete care guide of this Hoya species to enjoy its aromatic blooms and elegant foliage all spring and summer.
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Hoya Nummularioides [Plant Overview]
Belonging to the plant family Apocynaceae, Hoya Nummularioides is a semi-succulent tropical plant native to the rainforests of Thailand, Laos, Vietnam, and Cambodia.
Like most true Hoya species, the plant comprises a variety called Hoya Nummularioides ‘Silver.’
The basic overview of the plant is given in the table below.
| Characteristic(s) | Description(s) |
|---|---|
| Common Name | Porcelain Flower Wax Plant Wax Flower |
| Scientific Name | Hoya nummularioides |
| Origin | Tropical Forests of Southeast Asia (Thailand, Cambodia, Laos & Vietnam) |
| Family | Apocynaceae |
| USDA Zones | 10-11 |
| Flower | Inflorescence: Axillary Umbel Tiny white flower with pinkish-red corona |
| Foliage | Ovate (egg-shaped), fuzzy & green succulent leaves |
| Blooming Time | Throughout late summer and fall |
| Plant Size | About I-3 meters long |
| Fragrance | Sweet fragrance |
| Toxicity | Non-toxic to pets & humans |
Complete Hoya Nummularioides Care Guide
Being a tropical plant, Hoya Nummularioides favors a sultry and warm surrounding to reach its maximum growth.
The plant can bloom indoors with the correct balance of watering care and fertilizer care.
1. Sunlight & Temperature
Hoya Nummularioides prefer 6 hours of regular indirect bright sunlight with 65-90°F temperature.
They often get scorched from direct sun exposure resulting in floppy, wilted, and yellow or brown leaves.
Meanwhile, low light and cold temperatures (<60°F) cause leggy or sparse foliage, eventually pulling plant growth.
In such peril, use grow light, cover with frost blankets, or place heat pads underneath the plant to level light and temperature.
2. Water & Humidity
As Hoya Nummularioides are semi-succulent, they are relatively drought tolerant and prefer at least 60% humidity.
Hoya watering demands increase in spring and summer but reduce watering care in fall and winter every 3-4 weeks to avoid overwatering issues.
Despite the tolerance, Hoyas exhibit signs when the watering and humidity requirements are unmet.
- Overwatering: Immature dropping of flower buds and new leaves, wilting or yellowing leaves, and root rot.
- Underwatering: Petioles, leaf tips look brown and yellow, no flowers, and small brittle, weak vines.
- Low Humidity: Curling dry leaves, brown Hoya leaf tips.
- Excess Humidity: Fungal or pest problems, mold formation on top of the soil.
To ensure ideal moisture content for Hoya Nummularioides, check the soil moisture using a moisture meter before watering.
Otherwise, aim for a pebble tray underneath the plant pot aided with top-to-bottom watering.
3. Soil & Fertilizer
Hoya Nummularioides prefer well-draining, chunky, nutrient-rich soil (pH 6.1-7.5).
Furthermore, employ Hoya with a phosphorus-rich blend but nitrogen-based feed when adding new leaves.
That said, refrain from fertilizing your plant in winter to avoid overfertilization issues.
Overfertilized Hoyas often have brown leaf tips and margins but stunted, weak, and fragile growth but look weak with fragile, pale foliage when underfertilized.
Leveraging organic, homemade composts can avoid fertilization issues like root burn and choking.
Additionally, always dilute the fertilizer to its half strength before application.
4. Potting & Repotting
Hoya Nummularioides has a small root system and prefers 1-3 inches wide terracotta pots facilitating drain holes.
Besides that, severely root-bound Nummularioides grow slowly, and the soil dries up unusually quickly.
Your plant might need immediate repotting when suffering root rot from excess water or compact soil.
Carefully repot infected plants after thoroughly trimming infected parts and applying copper-rich fungicides.
5. Casual Pruning
Potted Hoya Nummularioides do not need frequent pruning but will not fuss about light pruning of damaged vines.
Meanwhile, pruning is crucial when they begin to host pests like mealybugs and aphids. Carefully trim off pest-infested parts and apply neem oil to prevent them.
Remember, you must not snip off the spurs (the part where the flower grows) because flowers grow from the same spurs every flowering season.
Also, you can regularly apply rubbing alcohol on the plant foliage to prevent a pest invasion.
Hoya Nummularioides Growth Rate & Flowers
As a vining evergreen perennial, Hoya Nummularioides grows slowly with consistent aromatic reddish-white blooms yearly during summer and fall.
The stellar bisexual blooms in clusters arise apically on the flowering stem, called the ‘flowering spur.’
Also, these flowers recurve and flare out from a single point giving the impression of an umbrella-shaped inflorescence called ‘Umbel.’
The stems can reach around 3.2-9.8 feet long and form new growth every growing season.
They actively add new foliage in spring and summer but gradually slow down and go dormant during fall and winter.
The waxy leaves are small, but the vines can grow long and drape from the sides when kept in a vertical garden wall or hanging baskets.
Toxicity of Hoya Nummularioides
According to ASPCA, Hoya plant varieties are non-toxic to humans and pets.
Hence, Hoya Nummularioides is free of any fatal toxic traits and can be safely kept indoors.
However, minor gastrointestinal upset and vomiting might appear under accidental consumption.
Additionally, the plant’s milky sap can cause minor rashes and blisters upon touch.
Therefore, take minor preventive measures like keeping the plant in a hanging basket to prevent contact with pets and children.
Remember, the plant’s vines can become long and cause you to trip over it.
Thus, regularly prune the hanging vines to keep the length in check.
Hoya Nummularioides: Propagation Methods
In the early spring, you can propagate Hoya Nummularioides via disease-free stem cuttings.
How to Propagate Hoya Nummularioides Using Stem Cuttings?
Follow these steps to propagate Hoya Nummularioides successfully.
- Cut 3-6 inches-long stem sections with healthy leaves using sterilized pruners.
- After, remove the lower 2 sets of leaves to expose 4 leaf nodes.
- Place the cutting inside the jar filled with rooting hormone solution.
- Ensure the stem nodes are submerged, but the top leaves are not touching the water.
- Place the jar near the indirectly bright windows.
- Replace the water every 2-5 days or place the cuttings in dark glass bottles.
The nodes will sprout new roots in about 3-5 weeks.
Once the root is 1-2 inches long, take the stem out and plant it in the soil by covering the roots completely.
Alternatively, you can root the stem cutting in the potting mix or use other propagation means, such as leaves and seeds.
Hoya Nummularioides for Sale
I have enlisted some verified online retailers where you can buy Hoya Nummularioides.
| Store | Delivery/ Shipping Time |
|---|---|
| Etsy | Within 1-3 days after placing an order |
| Gabriella Plants | Within 2-4 days after placing an order |
| Logees | Within 1-2 days after placing an order |
| Amazon | Within 4-5 days after placing an order |
Hoya Pubera Vs. Nummularioides
Nummularioides share similarities with Hoya Pubera in leaf shape, foliar arrangement, growth habit, flower clusters, etc.
But the striking difference between Hoya Pubera and Hoya Nummularioides is the texture of their leaf surface.
Hoya Nummularioides has fuzzy or pubescent leaves, but Hoya Pubera has a much smoother leaf texture.
From Editorial Team
Vigorous Bloom Hack!
You can encourage vigorous flowering in Hoyas by maintaining humidity at around 60% and carefully deadheading spent flowers.
Also, feed them fertilizers with high phosphorous fertilizer before the active growing season.
