Sweetheart Hoya
Hoya Kerrii
Hoya Kerrii, commonly known as Sweetheart Hoya or Valentine Hoya, is a charming succulent vine native to Southeast Asia. Its heart-shaped leaves make it a popular choice for indoor gardening, symbolizing love and affection.
Everything it needs
9 essentials at a glance
Watering
Hoya Kerrii prefers to dry out between waterings.
Water every 2-3 weeks during the growing season (spring and summer), allowing the top 1-2 inches of soil to dry out completely. In fall and winter, reduce watering to every 3-4 weeks. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause leaf shriveling and drooping.
Light
Hoya Kerrii thrives in bright, indirect light but can tolerate some direct sunlight.
Ideally, place it near a window with filtered light for about 6-8 hours a day. It can also adapt to lower light conditions, but growth may slow down.
Soil
The ideal soil for Hoya Kerrii is a well-draining potting mix, preferably 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 waterlogging.
Humidity
Hoya Kerrii prefers moderate humidity levels of 40-60%.
To increase humidity, you can mist the leaves, use a pebble tray with water, or place a humidifier nearby. Signs of low humidity include leaf curling and browning edges.
Temperature
This plant thrives in temperatures between 60-80°F (15-27°C).
It is best suited for USDA hardiness zones 10-12. Hoya Kerrii is sensitive to cold drafts and should be protected from temperatures below 50°F (10°C).
Fertilizing
Use a balanced liquid fertilizer with an NPK ratio of 20-20-20, diluted to half strength.
Fertilize every 4-6 weeks during the growing season and reduce to once every 2-3 months in fall and winter. Signs of nutrient deficiency include yellowing leaves and stunted growth.
Pruning
Prune Hoya Kerrii in late winter or early spring to encourage bushier growth.
Use clean, sharp scissors to remove any dead or damaged leaves and to shape the plant. Deadheading spent flowers can promote further blooming.
Repotting
Repot Hoya Kerrii every 2-3 years or when it becomes root-bound.
Choose a pot that is 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes or stunted growth. When repotting, gently remove the plant from its pot, loosen any tightly bound roots, and place it in fresh potting mix.
Propagation
Hoya Kerrii can be propagated through stem cuttings.
Take a cutting with at least one leaf and a node, allow it to callous for a few hours, then place it in moist potting mix. Keep the soil consistently moist but not soggy. Propagation is best done in spring or early summer when the plant is actively growing.
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 adequate drainage.
Drooping leaves
Why it happens
Under-watering or low humidity.
How to fix it
Increase watering frequency and humidity levels.
Brown leaf edges
Why it happens
Low humidity or exposure to direct sunlight.
How to fix it
Increase humidity and provide filtered light.
Root rot
Why it happens
Excessive moisture in the soil.
How to fix it
Remove the plant from its pot, trim away affected roots, and repot in fresh, dry soil.
Pests (e.g., mealybugs, spider mites)
Why it happens
Poor air circulation and high humidity.
How to fix it
Inspect regularly, wipe leaves with a damp cloth, and treat with insecticidal soap if needed.
Care through the year
Spring
In spring, increase watering frequency as the plant begins to actively grow. Fertilize every 4-6 weeks to support new growth.
Summer
During summer, ensure the plant receives bright, indirect light and maintain consistent watering. Monitor for pests due to warmer temperatures.
Fall
In fall, gradually reduce watering as the plant prepares for dormancy. Fertilize less frequently, about every 2-3 months.
Winter
In winter, water less frequently, allowing the soil to dry out more between waterings. Keep the plant in a warm location, away from cold drafts.
Toxicity & Safety
Hoya Kerrii is considered non-toxic to pets (cats and dogs) and children. However, ingestion of large quantities may cause mild gastrointestinal upset.
Good to know
How often should I water my Hoya Kerrii?
Water your Hoya Kerrii every 2-3 weeks during the growing season, allowing the top 1-2 inches of soil to dry out completely before watering again.
Why are my Hoya Kerrii 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 between waterings.
What light conditions are best for Hoya Kerrii?
Hoya Kerrii thrives in bright, indirect light but can tolerate some direct sunlight. Aim for 6-8 hours of filtered light daily for optimal growth.
Can I propagate Hoya Kerrii from cuttings?
Yes, Hoya Kerrii can be propagated from stem cuttings. Take a cutting with a node, let it callous, and place it in moist potting mix until roots develop.
What should I do if my Hoya Kerrii has root rot?
If you suspect root rot, remove the plant from its pot, trim away any affected roots, and repot it in fresh, dry soil to prevent further issues.
Is Hoya Kerrii toxic to pets?
Hoya Kerrii is non-toxic to pets and children, making it a safe choice for households with animals.
How can I increase humidity for my Hoya Kerrii?
To increase humidity, mist the leaves, use a pebble tray filled with water, or place a humidifier nearby to create a more favorable environment.
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