Porcelain Flower
Hoya Pubicalyx
Hoya Pubicalyx, commonly known as the Porcelain Flower or Wax Plant, is cherished for its stunning waxy leaves and fragrant blooms. Native to Southeast Asia, this resilient plant is perfect for indoor gardeners looking to add a touch of exotic beauty to their collection.
Everything it needs
9 essentials at a glance
Watering
Hoya Pubicalyx prefers to dry out between waterings.
Water thoroughly when the top 1-2 inches of soil feel dry, typically every 1-2 weeks. In winter, reduce watering to once every 2-4 weeks. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause leaves to shrivel and drop.
Light
This plant thrives in bright, indirect light but can tolerate some direct sunlight.
Ideally, place it near a window with filtered light for 6-8 hours a day. It can adapt to lower light conditions, but growth may slow down and flowering may be reduced.
Soil
Hoya Pubicalyx prefers a well-draining potting mix, ideally a blend of potting soil, perlite, and orchid bark.
A pH range of 6.0 to 7.0 is optimal. Ensure the pot has drainage holes to prevent water accumulation.
Humidity
This plant enjoys humidity levels of 40-60%.
To increase humidity, consider using a pebble tray with water or a humidifier. Signs of low humidity stress include leaf curling and browning edges.
Temperature
Hoya Pubicalyx thrives in temperatures between 60-80°F (15-27°C).
It is hardy in zones 10-11. Protect it from temperatures below 50°F (10°C) and avoid placing it in drafty areas.
Fertilizing
Use a balanced liquid fertilizer with an NPK ratio of 10-10-10 every 4-6 weeks during the growing season (spring and summer).
Reduce or stop fertilizing in fall and winter. Signs of nutrient deficiency include yellowing leaves and stunted growth.
Pruning
Prune Hoya Pubicalyx in late winter or early spring to encourage bushier growth and remove any dead or damaged stems.
Use clean, sharp scissors or pruning shears. Deadheading spent flowers can promote further blooming.
Repotting
Repot every 2-3 years or when the plant becomes root-bound.
Choose a pot 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes and stunted growth. To repot, gently remove the plant from its current pot, loosen the roots, and place it in fresh potting mix.
Propagation
Propagation can be done through stem cuttings.
Take a cutting with at least 2-3 leaves, allow it to callous for a few hours, then place it in moist potting mix. Keep the soil lightly moist and in bright, indirect light. Best timing is in spring or early summer.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or poor drainage.
How to fix it
Allow the soil to dry out and ensure the pot has proper drainage.
Dropping leaves
Why it happens
Under-watering or sudden temperature changes.
How to fix it
Check soil moisture and maintain consistent temperatures.
Root rot
Why it happens
Excessive moisture in the soil.
How to fix it
Remove the plant from the pot, trim away rotten roots, and repot in fresh, dry soil.
Pests (e.g., mealybugs, spider mites)
Why it happens
Low humidity and poor air circulation.
How to fix it
Increase humidity, improve air circulation, and treat with insecticidal soap or neem oil.
No blooms
Why it happens
Insufficient light or improper fertilization.
How to fix it
Ensure the plant receives bright, indirect light and fertilize during the growing season.
Care through the year
Spring
In spring, resume regular watering and fertilizing as the plant enters its active growth phase. Check for pests and prune if necessary.
Summer
During summer, ensure the plant receives bright, indirect light and maintain humidity levels. Water more frequently as the plant grows.
Fall
In fall, gradually reduce watering as the plant's growth slows. Stop fertilizing and prepare for the winter dormancy period.
Winter
In winter, water sparingly and keep the plant in a warm area away from drafts. Monitor for any signs of stress due to low humidity.
Toxicity & Safety
Hoya Pubicalyx is considered non-toxic to pets and children. However, ingestion of large quantities may cause mild gastrointestinal upset. Always monitor pets around houseplants.
Good to know
How often should I water my Hoya Pubicalyx?
Water your Hoya Pubicalyx every 1-2 weeks, allowing the top 1-2 inches of soil to dry out between waterings. In winter, reduce watering frequency.
Why are my Hoya Pubicalyx leaves turning yellow?
Yellow leaves can indicate over-watering or poor drainage. Ensure the pot has drainage holes and allow the soil to dry out before watering again.
What light conditions are best for Hoya Pubicalyx?
Hoya Pubicalyx thrives in bright, indirect light but can tolerate some direct sunlight. Aim for 6-8 hours of filtered light daily.
How do I propagate Hoya Pubicalyx?
Propagate by taking stem cuttings with 2-3 leaves, allowing them to callous, and then placing them in moist potting mix in bright, indirect light.
What should I do if my Hoya Pubicalyx isn't blooming?
If your Hoya isn't blooming, check for adequate light and ensure you are fertilizing during the growing season. Insufficient light can hinder flowering.
Is Hoya Pubicalyx toxic to pets?
Hoya Pubicalyx is non-toxic to pets and children, but ingestion of large amounts may cause mild gastrointestinal upset.
When is the best time to prune Hoya Pubicalyx?
The best time to prune Hoya Pubicalyx is in late winter or early spring to encourage bushier growth and remove any dead stems.
Grows well with
Track this plant in your garden.
Set care reminders, log growth, and join a community of plant lovers.