PlantsHoyas→Wax Plant (Hoya carnosa)

Botanical names:
Hoya carnosa Accepted
Hoya motoskei Synonym
Hoya crassifolia Synonym
Hoya picta Synonym
Hoya rotundifolia Synonym

General Plant Information (Edit)
Plant Habit: Cactus/Succulent
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Partial or Dappled Shade
Water Preferences: Mesic
Minimum cold hardiness: Zone 10a -1.1 °C (30 °F) to +1.7 °C (35 °F)
Leaves: Evergreen
Other: May have silver-gray speckles.
Flowers: Showy
Flower Color: White
Other: Pale Pink with darker pink/mauve bar down the middle of petals
Bloom Size: Under 1"
Flower Time: Late spring or early summer
Other: Off and on throughout the year
Suitable Locations: Houseplant
Wildlife Attractant: Butterflies
Resistances: Humidity tolerant
Propagation: Other methods: Cuttings: Stem
Containers: Suitable for hanging baskets
Needs excellent drainage in pots
Prefers to be under-potted
Miscellaneous: Epiphytic


The All Things Plants Most Popular Vines and ClimbersThe All Things Plants Most Popular Vines and Climbers
By dave on June 21, 2014

Today we open Vines and Climbers week by giving a list of the top 25 vines in our database, judged by how many contributions have been made to the various plant entries. Enjoy the list!

(Full article15 comments)
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Posted by plantladylin (Sebastian, Florida - Zone 10a) on Sep 23, 2011 6:41 PM

I have a few different Hoyas and I find the carnosa to be one of the easiest to grow. While there are a few Hoyas that love a lot of sun, the carnosa (at least here in Florida) prefers bright light but no direct sun. I learned this the hard way after finding very scorched foliage from leaving my plants out in the intense Florida sun. My very old carnosa is large and lush, but it doesn't bloom very often, only a sporadic flower or two every few years. The smaller plants seem to bloom a couple of times a year. The blooms are quite pretty and have a slight fragrance in the evening hours and at night.

I grow my Hoyas (and most of my other plants) in a chunky, fast-draining potting medium consisting of mostly orchid bark mix with a little potting soil incorporated. This medium requires watering more often in the summer months, sometimes twice a week if we don't have rain, but I no longer have the problem of losing plants to soggy, rotting roots.

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Posted by threegardeners (Brockville, Ontario, Canada - Zone 5a) on Sep 29, 2011 7:19 AM

I live in Ontario, Canada.
Hoya carnosa loves to be grown on the dry side. I water it every week and a half.
It will thrive in a north facing window. I have mine just to the side of a north window and it grows constantly.
It prefers to be very root-bound, mine's been in the same pot for 15 years.
Misting the plant is also helpful.

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Posted by SongofJoy (Clarksville, TN - Zone 6b) on Mar 9, 2012 5:03 PM

Hoya carnosa is a fast growing, super hardy species well suited for baskets or ladders.

Flowers half an inch across comes in bunches of 20 to 40 hanging from along the stems. Old flower stems will reflower year after year. Flowers may vary in colour from pale white to a soft pink.

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Posted by RadlyRootbound (East-Central Mississippi - Zone 8a) on Oct 5, 2019 11:38 PM

Although I am not an "expert" by far, I've had a Hoya carnosa 'Compacta' for a couple of years and can comment from my experience with it. From the appearance of the plant, with its hard vine and tough, waxy-looking leaves, I assumed (incorrectly) it would fare well with lots of sun, so for the first summer, I had it outside on my garden patio in full sun for the first half of the day, and I watered it every couple of days, since it was in full, hot sun. For reference, I live in central Mississippi, and although it "managed" in those conditions here, some of the leaves became "sun scorched" and it didn't bloom. This summer, I placed it in a different spot that only received full sun in the early morning and remained shaded but in bright light for the rest of the day. I also didn't water nearly as often, and it must like these conditions much better, for it has remained in constant bloom this summer, usually with as many as five bloom clusters at once. From this experience, I would say that they prefer bright light but little direct sun in order to thrive. Also, oddly enough since they root very readily just stuck in a glass of water, I should reiterate that it was watered much less frequently this year (to the point of neglect, even!), yet it seemed to appreciate the "drought" conditions and kept right on blooming and showing very well despite being "neglected". That, and the fact that most advice says to keep it pot-bound, indicates to me that this is a very "shy" plant that prefers to just be left alone in its own (bright) little corner, with as little pampering attention as possible--the more "neglect", the better, perfect for someone whose houseplants tend to die from being forgotten.

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Plant Events from our members
ethompson92 On April 2, 2020 Obtained plant
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Discussion Threads about this plant
Thread Title Last Reply Replies
Photo of the entire plant of Wax Plant (Hoya carnosa) by lauriebasler Jul 15, 2016 12:18 AM 2
Amount of Sun for Hoyas by sibbyp48 Oct 5, 2019 11:09 PM 1
Growing Hoya Carnosa outdoors Zone 9B by jasriniv Apr 1, 2021 10:39 AM 1
Help with massive Hoya by thalianova Mar 15, 2021 6:28 PM 5
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Baby Hoya Imperialis Red slowly withering by icantevenhoyabro Mar 27, 2021 11:16 AM 9
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Looking for houseplants that are almost impossible to kill! by PAgirl63 Jan 24, 2021 4:04 PM 33
What type of Hoya is this, please? by codielane Jan 6, 2021 7:09 PM 5
what's wrong with my hoya carnosa leaves? by Imjuzagurl Nov 30, 2020 5:38 PM 0

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