Hoya Hearts Care (Hoya kerrii)

This plant needs a lot of strong filtered light, as it receives in the wild. However, limit direct sun exposure.

• Give about 6-8 hours of indirect light daily for steady growth and healthy, firm leaves.
• Morning sun is usually tolerated, but afternoon sun can scorch or yellow its heart-shaped leaves.
• In lower light, growth slows, and variegated forms may lose contrast or become weak.

Tip: If your home doesn’t provide enough light, supplement it with artificial lighting. Hoyas respond well to LED grow lights, which can help support growth when natural sunlight is limited.

Remember that Hoya kerrii needs cautious watering and should dry well between soakings. 

• Water every 10-14 days in average indoor conditions if the soil is dry enough.
• Yellowing, soft stems, or wrinkled leaves signal watering problems, especially if drainage is poor.
• Reduce watering in winter and increase slightly during warm, bright periods.

Life hack: If the leaves are firm and full, the houseplant likely still has enough moisture. If they start to feel softer, thinner, or lightly wrinkled, it’s usually a sign that it’s ready for a watering.

These species like warm and humid conditions, so try to provide them at home. A similar-to-nature environment reduces stress for the houseplant.

• Best growth occurs around 65-85°F (18-29°C), especially with steady warmth and bright filtered light.
• Keep it above 50°F (10°C), as colder conditions can slow growth and damage the leaves.
• Protect the plant from frost, drafts, and temperature drops during winter.

Note: In the United States, Hoya kerrii is usually kept as an indoor houseplant, but in very warm climates (USDA hardiness zone 11), it can also live outside all year.

Moderate humidity helps this species grow well, but it usually tolerates average indoor air. Another option is to place it in one of the more humid areas of your home, such as a bathroom, kitchen, or laundry room, where moisture levels are naturally higher.

Like all epiphytes, Hoya kerrii grows best in an airy, fast-draining mix that prevents roots from staying wet.

• Use a loose blend with orchid bark, perlite, and compost or coco coir.
• A chunky, well-aerated structure helps reduce root rot and supports healthy vine growth.
• Slightly acidic to near-neutral soil is suitable for steady growth.

Note: Don’t neglect special potting mixes. Without added materials to improve drainage and airflow, the mix can become dense, restrict the roots, and slow overall growth.

As a rule, people don't have any problems growing this houseplant in containers. Use a small, snug container of about 4-6 inches (10-15 cm) because oversized pots hold moisture around the roots too long. Also, add a trellis or support when vines become longer and heavier.

Light feeding during active growth helps your Hoya kerrii produce stronger vines and leaves.

• Use a special houseplant fertilizer or a bloom-supporting hoya fertilizer.
• Feed every 4-6 weeks in spring and summer, but don't do it more often.
• Apply fertilizer at half strength to avoid root stress.

Warning: Feeding too frequently or using overly concentrated fertilizer can leave excess mineral salts in the potting mix. Over time, this buildup may damage the roots and show up as burned leaf tips.

This species needs only light pruning, mainly in spring or after flowering. Just remove dead, damaged, or yellowing stems and trim overly long vines to control shape, but avoid heavy cutting. Use healthy cut stems for propagation if desired.

Note: Do not remove old flower spurs, because hoyas can bloom again from them.

Do this procedure every 2-3 years in spring or summer, not very often. Move it only one pot size larger to avoid excess wet soil.

• Carefully take the plant out of its pot, trying to disturb the roots as little as possible. If it does not slide out easily, press the sides of the container to loosen the root ball.
• After removing it, shake away or loosen as much of the old potting mix as you can.
• Add a fresh mix to the pot bottom, set the plant in place, and fill around the roots with more mix.
• Once it is secure, water it and return it to the same spot where it was growing before.

There are two main ways to propagate: from stem cuttings with at least one node or from leaf cuttings. The first method is used more often:

• Take cuttings in spring or early summer during active growth.
• Use a vine section with one or two leaves and a visible node.
• Root in water, moist sphagnum, or a very airy propagation mix for 2-3 weeks.
• Plant the rooted cuttings in a well-draining potting mix. For the first 2-3 weeks, keep the mix lightly moist while the new roots adjust.

Note: Single leaves without a node usually do not form vines.

Winter care is important because Hoya kerrii is frost sensitive and slows down in cooler months. Keep it away from cold windows or drafts, water less often while growth is slow, and stop fertilizing until active growth returns in spring.