Hoya plants (Hoya carnosa) are also commonly known as wax plants because their leaves and flowers look like they are carved from wax. While they can be grown outdoors in USDA Hardiness Zones 9 to 11 (meaning they can stand temperatures that dip down to 20 degrees Fahrenheit, or -3.9 degrees Celsius), [1] X Research source they are most commonly grown indoors. This species is one of the easiest flowering houseplants to grow successfully. Their long, trailing stems can be trained to grow up a small trellis or the plant can be grown in a hanging container with the long stems dangling down. [2] X Trustworthy Source Missouri Botanical Garden Oldest botanical garden in the U.S. and center for botanical research and science education Go to source When Hoya plants get big enough, they will produce round umbels or clusters of star-shaped flowers.
Steps
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Pick out a bright spot for your Hoya. In particular, look for a spot near an north- or east-facing window so your Hoya can get plenty of natural light. [3] X Expert Source Harmony Corelitz
Plant Specialist Expert Interview. 4 December 2020. Hoyas do best in bright, indirect sunlight throughout the day, though they also prefer to have two to four hours of direct sunlight.- If you have a south- or west-facing window, keep your Hoya about 3–5 ft (0.91–1.52 m) away from it. If it's too close, the leaves can get sunburned. [4]
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Expert Source
Harmony Corelitz
Plant Specialist Expert Interview. 4 December 2020.
- If you have a south- or west-facing window, keep your Hoya about 3–5 ft (0.91–1.52 m) away from it. If it's too close, the leaves can get sunburned. [4]
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Harmony Corelitz
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Move your older plant if it has stopped blooming as much. A two- to three-year old plant that does not bloom is probably not getting enough sunlight. If this occurs, try exposing it to another hour or two of direct sunlight.Advertisement
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Water Hoya plants when the potting soil becomes almost completely dry. Use room-temperature water that has been “aged” or left sitting in an open container for at least 24 to 36 hours. Hoya plants are tropical plants that could be stressed by cold tap water.
- Letting the water sit for 24 to 36 hours also allows chlorine and fluorine dissipate naturally. Chlorine and fluorine are chemicals commonly found in tap water that can potentially harm plants.
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Water your plant in the morning. This allows the moisture to be available to the plant throughout the day. Doing this also ensures that the leaves will dry before temperatures cool at night.
- Let the soil dry out about three-quarters of the way before you water it again. Since Hoyas are succulents, they hold a lot of water in their leaves, so you don't need to keep the soil too moist. [5]
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Expert Source
Harmony Corelitz
Plant Specialist Expert Interview. 4 December 2020.
- Let the soil dry out about three-quarters of the way before you water it again. Since Hoyas are succulents, they hold a lot of water in their leaves, so you don't need to keep the soil too moist. [5]
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Harmony Corelitz
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Pour the water evenly over the soil until it drains from the bottom of the pot. Empty the catch basin beneath the pot after the water drains through. Water left in the catch basin could be absorbed back up into the potting soil, keeping the roots too wet and depriving them of oxygen.
- Hoya plant roots need oxygen to keep them healthy. If the roots are kept too wet they could develop root rot.
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Keep the season in mind. Hoyas need to be watered more often during the spring and summer while they are actively growing and less often during the fall and winter. [6] X Research source
- If a Hoya plant begins to drop its leaves, it is probably being watered too often. Let the soil dry a little more before watering it again.
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Fertilize Hoya plants with a balanced, water-soluble houseplant fertilizer. Do this every three to four weeks during the spring and summer. Fertilizer with a ratio of 5-10-5, 8-8-8 or 10-10-10 is fine. [7] X Trustworthy Source University of Georgia Cooperative Extension Division of the University of Georgia focused on research and community education Go to source
- A common dilution rate is 1 teaspoon per gallon of water, but this varies.
- The dilution rate and application frequency may need to be adjusted based on an individual Hoya plant’s needs.
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Adjust the frequency that you feed your plant based on the plant’s health. If the leaves and stems become pale, the Hoya needs to be given fertilizer every two weeks. If new leaves are smaller and darker than usual with shorter stems between the leaves, give the Hoya fertilizer every six weeks.
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Water your plant before fertilizing it. Mix the solution up and pour it evenly over the soil immediately following a regular watering. Do not give Hoyas fertilizer solution when the potting soil is dry as it could burn their roots. They should not get any fertilizer during the fall and winter.
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Do not remove the spent flower stems after your Hoya blooms. It will produce flowers on those stems again the next time it blooms. Also, do not move the Hoya after it begins to develop new flower buds. Moving the Hoya could disturb it and cause it to drop the buds before they open.
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Repot Hoyas only when they are completely pot-bound. The container will be packed with roots when it is ready to be repotted. Being pot-bound encourages Hoyas to bloom. Repot the Hoya into a container with drain holes that is only one size larger than the current container. [8] X Trustworthy Source University of Georgia Cooperative Extension Division of the University of Georgia focused on research and community education Go to source
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Use a peat-based commercial potting soil that contains perlite for improved drainage. Read the ingredients on the potting soil bag. It should be primarily sphagnum peat moss. Pour an inch or two of potting soil into the new container.
- You can also use a combination of three-quarters succulent mix with one-quarter potting soil. [9]
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Expert Source
Harmony Corelitz
Plant Specialist Expert Interview. 4 December 2020.
- You can also use a combination of three-quarters succulent mix with one-quarter potting soil. [9]
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Expert Source
Harmony Corelitz
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Turn the Hoya on its side and gently pull it out of the old container. If it seems to be stuck, run a butter knife around the inside of the container to loosen the roots.
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Set the Hoya in the new container. Finish filling the container with potting soil. Water the Hoya generously to help settle the soil around the roots.
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Expert Q&A
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QuestionWhat potting mix should I use for a Hoya?Harmony Corelitz is a Plant Specialist and the Ecommerce Manager at Crimson Horticultural Rarities, Inc, a boutiue offering rare plants, flower arragements, and handmade goods. Harmony grew up helping her parents run their family business in plant maintenance and interior plantscaping. Harmony specializes in indoor plant care and interior plant design. Prior to her workwith Crimson Horticultural Rarities, she started her pop-up plant and vintage home goods shop called Younger Child and helped her former employer, Plants and Friends, grow and expand to two locations. She holds a BA from the University of San Francisco.Pot Hoyas in a well-draining potting mix. I suggest three-quarters of succulent mix with one-quarter general potting soil, though a full succulent mix is fine for them indoors, as long as the mix doesn't contain any compost.
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QuestionHow often should I water my Hoya?Harmony Corelitz is a Plant Specialist and the Ecommerce Manager at Crimson Horticultural Rarities, Inc, a boutiue offering rare plants, flower arragements, and handmade goods. Harmony grew up helping her parents run their family business in plant maintenance and interior plantscaping. Harmony specializes in indoor plant care and interior plant design. Prior to her workwith Crimson Horticultural Rarities, she started her pop-up plant and vintage home goods shop called Younger Child and helped her former employer, Plants and Friends, grow and expand to two locations. She holds a BA from the University of San Francisco.Hoyas are semi-succulents, so you can let the soil dry out quite a bit in between watering. I suggest letting the soil dry out about three-quarters of the way before you water them again, because they hold a lot of water in the leaves themselves.
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QuestionHow much light do Hoyas need?Harmony Corelitz is a Plant Specialist and the Ecommerce Manager at Crimson Horticultural Rarities, Inc, a boutiue offering rare plants, flower arragements, and handmade goods. Harmony grew up helping her parents run their family business in plant maintenance and interior plantscaping. Harmony specializes in indoor plant care and interior plant design. Prior to her workwith Crimson Horticultural Rarities, she started her pop-up plant and vintage home goods shop called Younger Child and helped her former employer, Plants and Friends, grow and expand to two locations. She holds a BA from the University of San Francisco.Hoyas need a lot of natural light, but too much direct sun can cause sunburn. Ideally, keep them directly in front of a northern or eastern window, or keep them within 3-5 feet from a southern or western window.
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Tips
- The Hoya’s stems usually grow to between 2 and 4 feet long.Thanks
- The flowers usually have red or pink centers and white petals but some cultivars produce flowers with brown, pink or purple petals. There is even a red-flowering Hoya but it is very rare. The flowers are extremely fragrant and smell like chocolate.Thanks
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References
- ↑ http://planthardiness.ars.usda.gov/PHZMWeb/
- ↑ http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b537
- ↑ Harmony Corelitz. Plant Specialist. Expert Interview. 4 December 2020.
- ↑ Harmony Corelitz. Plant Specialist. Expert Interview. 4 December 2020.
- ↑ Harmony Corelitz. Plant Specialist. Expert Interview. 4 December 2020.
- ↑ http://www.floridata.com/ref/h/Hoya_carnosa.cfm
- ↑ https://extension.uga.edu/publications/detail.html?number=B1318#nutrition
- ↑ https://extension.uga.edu/publications/detail.html?number=B1318#nutrition
- ↑ Harmony Corelitz. Plant Specialist. Expert Interview. 4 December 2020.
About This Article
Article Summary
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To care for a Hoya plant, place it near an east or west-facing window, so it can get a few hours of indirect sunlight a day. When its potting soil becomes very dry, add warm water to the pot, since Hoya plants are tropical and don’t respond well to cold water. Keep in mind that Hoyas need to be watered more often during spring and summer, but less often during fall and winter. If its leaves start to fall off, try watering it less often to let the soil dry a bit. You should also fertilize your Hoya plant with a balanced, water-soluble houseplant fertilizer every 3-4 weeks to make sure it gets the nutrients it needs. For more tips, including how and when to repot your Hoya plant, read on!
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Reader Success Stories
- "I have a huge Hoya because a friend was getting rid of it and I couldn't let that happen. My Mom (bless her) always talked about Hoya plants, and this plant makes me think of her. It is now climbing all over the place in a large sunny west window. Today I thought I should put it in a bigger pot because it has now hit the floor and has only bloomed once. I learned that I am over watering, worrying about a larger pot and considering pruning it back, as well as the kind and time for fertilizing." ..." more
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"I have a huge Hoya because a friend was getting rid of it and I couldn't let that happen. My Mom (bless her) always talked about Hoya plants, and this plant makes me think of her. It is now climbing all over the place in a large sunny west window. Today I thought I should put it in a bigger pot because it has now hit the floor and has only bloomed once. I learned that I am over watering, worrying about a larger pot and considering pruning it back, as well as the kind and time for fertilizing."
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"I just repotted my 40+ year old hoya that has been root bound for many years. The plastic pot it was in was cracking from age and the pressure of the roots. It usually flowers once a year. Thank you for giving me the confidence to put it in a pot that is only slightly larger than the old pot."
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"5 years ago I was given a clipping of this plant. It has never bloom yet, but I did change my watering and will give it a bit more sunlight. Hopefully, I will see some flowers. I also need to see about getting some food for it. It was a great help. Thanks."
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"Great info on watering, light, fertilizing, and repotting. I started a slip from a friend's 30-year-old plant 3 1/2 years ago. It is now 4 feet tall, very healthy, lots of speckled leaves, but no flowers. In its original pot, but no blooms yet. Patience!"
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"I've had my hoya for at least three years; it has grown very little and has never bloomed. I didn't realize that it needs to be fertilized every few weeks during the spring and summer. I also didn't know that the plant should be watered before feeding."
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