All About Hoya Kerri Care

All About Hoya Kerrii Care

Hoya Hearts, Hoya Heart Plant

Wax Plant, Wax Flower, Porcelain Flower

Hoya kerri also known as Hoya Heart Plant is an epiphytic plant native to Southeast Asia. Kerri has heart-shaped leaves that can be either variegated or solid green. The name Kerrii comes from the physician Arthur Francis George Kerr that first brought the plant to the West from Thailand.

One of the reasons hoyas are so popular is because of their beautiful flowers! The Hoya Heart plant has white flower petals with a dark red to brown rim around a white center. The flowers grow together in a large cluster typical of hoya plants.

As aside from the beautiful flowers, another feature that makes this plant highly desirable is that Hoya Kerrii is non-toxic and Pet Safe.

All About Hoya Kerrii Care

How To Care for Hoya Kerrii

All Hoyas are epiphytes and grow from trees and rocks in their native Rainforest environment. They are part of the Apocynaceae family. Unlike terrestrial plants, they prefer airy, loose soil and will struggle to survive in compact soil mixes. A soil mix for Hoya Kerrii can be created by adding orchid bark and perlite to traditional potting mixes found in most stores.

The Hoya Heart plant needs to be potted up an inch or two once the roots start growing out of the bottom of the pot. Most Hoyas prefer to be slightly rootbound and may not need to be potted up every year.

Single-leaf Hoya Kerrii plants may take well over a year to start growing past the initial leaf. These are often sold as novelty plants for Valentine’s Day. Unfortunately, most single-leaf cuttings will not develop into a full plant. A node and vine are needed to produce further growth. Jump to propagation for more information.

They prefer high temperatures and humidity and do well on a shaded porch during the humid summers. They love a bright, sunny window, especially during the cooler months but avoid direct, afternoon summer sun. They naturally get bright light but it is filtered through tree leaves.

Read on to learn care tips for Hoya Kerrii……

USDA Zone 11-12

They like to dry out between waterings. It’s best to water when the top 1-2 inches of soil is dry. If you are unsure, stick your finger in the soil. Too much water can cause root rot.

These are medium plants growing to around 1-2 feet wide but can get very long if allowed to trail. They can be kept compact and full by pruning. Read on to learn how.

They prefer bright, indirect light and often need it to induce blooming. However, they can grow well in medium-light situations. They will survive in low light but not thrive and likely not flower. Hoya Kerrii can tolerate and may prefer direct morning sun as long as it’s not too intense. Remember the rule, if you are going to burn, your plant is going to burn.

For Hoya Kerrii, use an airy potting mix that drains well. Incorporate orchid bark and perlite into regular soil to create more airflow.

They are native to Tropical environments and like 50% or higher humidity levels.

Hoya Kerrii is non-toxic and safe for children and pets. Find more pet-safe plants here.

Fertilize every three months during the growing season with Green Grub Insect Frass. You can either make a compost tea to water with every time or sprinkle a layer of fertilizer on top of the soil. If using synthetic fertilizers remember that high phosphorus encourages flowering.

Propagate by stem cuttings. Read on for propagation instructions.

Hoya Kerrii Propagation

How to Propagate Hoya Kerri

Propagating Hoya Heart plant is easy and encourages bushier growth! It’s best to wait until after your plant finishes blooming in the spring to take cuttings.

1. Take a stem cutting from your plant that has two to three leaf sections on it. Make your cut below the bottom leaf node. Remember, leaf cuttings will root but most likely not grow into a full plant.

2. Place the cuttings in a dry, well-ventilated place for 24 hours while the cuts callus over.

3. Place the stem one inch deep into a potting mix or into a cup of water for water rooting.

4. Keep the soil moist and warm for best rooting conditions and you should have root growth in a couple of weeks. You can use this method to create new plants from cuttings or to fill out a current plant and make it larger and bushier.

How to get Hoya Kerrii to Bloom

Getting Your Hoya Kerrii to Bloom

All Hoyas are triggered to bloom when temperatures, moisture, and light increase due to seasonal changes. The Hoya Heart plant blooms when temperatures and sunlight increase during the spring.

Depending on where you live and the temperature and humidity inside your home, you may need to remind your hoya that winter has passed and now it’s spring and time to bloom.

If you keep your house on the warm side, your plant may not realize it’s winter. It may be necessary to move it to a cooler place and keep it on the dryer side during the winter months. Not freezing, just a little cooler.

After your Hoya Kerrii has experienced winter, move it back to a warm, sunny spot for spring. Make sure you increase watering and it gets plenty of light, especially morning light. Apply a fertilizer with a higher phosphorus content. It’s also a good idea to mist your hoya daily in order to mimic spring rains. Once it senses the change in temperatures and sunlight, it’ll bloom!

Another tip, hoyas bloom when they are slightly root-bound. If there is too much space in the pot, hoyas will refuse to flower and instead grow roots to fill out the pot.

Finally, some hoya species won’t flower until they are mature. If it’s a baby, give it a few years to grow.


We are here to spread our love of houseplants! There are many different varieties of plants that we keep in our homes. All of them with different needs and preferences. This blog is to share our knowledge about all kinds of houseplants and help people care for their own plants.

You may also like...