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Hoya Nummularioides: Best Grow & Care Guide

The waxy green foliage of Hoya nummularioides becomes more pronounced and offers fragrant flowers when provided with a proper nutrient boost and ideal care.

Hoya nummularioides need bright, filtered sunlight with temperatures of 65 to 90°F and humidity of 50-70% for optimal growth. To encourage better foliage growth, give your Hoya chunky, well-draining soil and monthly balanced fertilizer with light pruning and repotting every 2-5 years.

Read on to learn the comprehensive grow and care guide of Hoya nummularioides to enjoy aromatic blooms all spring and summer.

Overview of Hoya Nummularioides

Hoya nummularioides is a semi-succulent tropical plant native to the rainforests of Thailand and Cambodia.

They are among the most beautiful Hoya variety with magnificent white flowers that offer a sweet scent.

Common NamePorcelain Flower Hoya
Scientific NameHoya nummularioides
OriginThailand, Cambodia, and tropical Asia
USDA Zones10-11
FlowerTiny white flower with pinkish-red corona
FoliageRound, small succulent leaves with tiny flowers
Blooming TimeThroughout late summer and fall
HeightUp to 3 meters tall
FragranceSweet fragrance
ToxicityNon-toxic to pets and humans

Hoya Nummularioides: Ultimate Growing & Care Guide

Being a tropical plant, Hoya nummularioides prefers a natural habitat-like care to achieve their maximum potential.

Care Tips for Hoya Nummularioides
By mimicking natural habitat-like care conditions, you can make Hoya nummularioides bloom longer with sweet-scented flowers.

1. Sunlight & Temperature

The vines of Hoya nummularioides prefer to sit under daily six hours of indirect bright sunlight with a warmth of about 65 to 90°F.

They often get scorched from direct sun exposure resulting in floppy, stressed, yellowing Hoya leaves.

Furthermore, prolonged direct sun and excess heat can negatively influence Hoya flowering.

So, place Hoya plant a few feet away from the east or south window, ensuring 2-3 hours of direct sunlight. Also, use sheer drapes to lower light intensity.

Meanwhile, low light and cold temperature(<60°F) causes leggy or sparse foliage growth and eventually pushes the plant growth.

In such peril, employ grow light, frost blankets or heat pads underneath the plant to keep light and temperature at an ideal level.

2. Water & Humidity

As Hoya nummularioides are semi-succulent, they are relatively drought tolerant and prefer at least 60% humidity.

For ideal watering, aim for regular misting and fetch rain or chemical-free water to your Hoya plant only after the top two inches of soil are dry.

The watering needs of Hoya increase during summer, so carefully increase watering habits but reduce in winter to every 3-4 weeks to avoid overwatering issues.

Despite the tolerance, Hoyas exhibit signs when the watering and humidity requirements are not adequately met.

  • 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: More 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 to 7.5) that doesn’t retain water for too long.

As Hoyas do not like having wet feet, prepare a well-draining mix by blending orchid mix, perlite and peat most. Also, replenish soil nutrients via monthly balanced fertilization.

Furthermore, feed flowering Hoya with phosphoric fertilizer and nitrogen when they are actively adding new leaves in spring.

That said, refrain from fertilizing your plant in winter to avoid overfertilization issues.

Overfertilized Nummularioides often have yellow, brown leaves with stunted growth but look weak with fragile, pale foliage when under-fertilized.

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 and Repotting

Hoya nummularioides has a small root system and prefers small, cozy 3-5 inches wide terracotta pots facilitating drain holes.

They need repotting to 2 inches bigger pots only when roots begin to pop out of the drainage holes and when they interthread with each other. Otherwise, you can repot Hoyas every 2 to 5 years.

Besides that, severely root-bound Nummularioides grow slowly, and the soil dries up unusually quickly.

Having that said, your plant might need immediate repotting when they are suffering root rot brought on by excess water or compact soil.

Carefully repot infected plants after thoroughly trimming infected parts and applying fungicides.

5. Casual Pruning

Potted Hoya nummularioides do not need frequent pruning but will not fuss about light pruning of damaged vines.

So, light pruning in the early spring and summer will be sufficient to maintain plants’ charming looks.

Meanwhile, pruning is crucial when they begin to host pests like mealybugs and aphids. Carefully trim off pest-infested parts and apply neem oil and insecticides 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: All About Growth

Hoya nummularioides grow pretty quickly and are consistent every year about their blooming.

They actively add new growth in spring and summer but gradually slow down and go dormant in winter.

Mainly grown for attractive waxy foliage and aromatic flowers, Hoya nummularioides has a medium growth rate and can add a few branches in a few months.

Nummularioides can grow up to 3 meters (10 feet) tall within 2-4 years if provided with proper growing conditions.

cluster of flowers of hoya Nummularioides
With prompt deadhead and careful pruning (avoiding the spurs), the flowering of the Hoya nummularioides can be boosted.

The waxy leaves are small, but the vines can grow very long and spread out from the sides when kept in a hanging basket.

In addition to aesthetic leaves, mature Nummularioides produce clusters of sweet-smelling fragrant flowers once or twice a year.

The tiny flowers are star-shaped and have white petals with a reddish-pink corona in the center.

Toxicity of Hoya Nummularioides

Unlike most houseplants that are beautiful outside but toxic inside, Hoya nummularioides is free from any toxicity.

However, minor gastrointestinal upset and vomiting might appear under accidental consumption.

Therefore, take minor precautionary measures like keeping the plant in a hanging basket to prevent accidental consumption.

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.

Method to Propagate Hoya Nummularioides

Regarding Hoya nummularioides, propagation is a much better efficient option than buying a new plant.

In the early active growing season, you can quickly propagate Hoya nummularioides via stem cutting.

But before propagation, ensure the mother plant is healthy and free from any infection to prevent further spread.

Steps to Propagate Hoya Nummularioides

After choosing the healthy mother plant for propagation, disinfect the cutting tools by applying alcohol with a cotton pad.

  • Choose a healthy stem and cut 3-6 inches of it.
  • Ensure to leave a few leaves and nodes in the stem.
  • Place the cutting inside the jar filled with water and rooting hormone.
  • Ensure the stem nodes are submerged, but the top leaves are not touching the water.
  • Place the jar near the indirectly bright windows but safe from direct sunlight.
  • Replace the water every week to avoid stagnant water.

The node will start to root in about 3 to 5 weeks. Once the root is 1-2 inches long, take the stem out and plant it in the soil.

Alternatively, you can root the stem cutting in the potting mix directly. Just ensure the mix you use is well-draining.

Where to Buy Hoya Nummularioides?

Compared to other Hoya species, Hoya nummularioides are not rare and often available in most nurseries.

I have enlisted some verified online retailers with Hoya nummularioides for sale here.

StoreShipping Time
EtsyShipping in 1 or 2 weeks.
Gabriella Plants3-7 business days
Logees5-7 business days
Tropics At Home7-14 days

FAQs About Hoya Nummularioides

Is Hoya nummularioides fuzzy?

Hoya nummularioides have tiny pointy green leaves that are somewhat pubescent or fuzzy.

Is Hoya pubera the same as Nummularioides?

No, they are different plants. Nummularioides have somewhat fuzzy pointy green leaves, while pubera has smooth leaves without pubescent.

From Editorial Team

Vigorous Bloom Hack!

You can encourage vigorous flowering of the Hoya nummularioides by maintaining humidity at around 60% and careful deadheading of spent flowers.

Also, feed them fertilizers with low nitrogen but high phosphorous proportioned fertilizer right before the active growing season.

All The Best!

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