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Hoya Carnosa: Care Tips and Top Secrets for Blooming

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Hoyas are among the easiest houseplants there are. There are a variety of species available to grow in the home and most of them thrive on neglect! Imagine that. A houseplant that will tend to do better if you forget about it once in a while. Keep reading and I will show you how I take care of my Hoya carnosa (although the care will also apply to most hoyas!)

hoya carnosa

Not only do hoyas thrive on neglect and have beautiful waxy foliage, hence the common name Wax Plant, but they also will flower for you! More on that later.

Hoyas in Nature

Most hoyas are epiphytes in nature, and Hoya carnosa is native to Eastern Asia and Australia. Being epiphytes, you’ll want a light and coarse growing medium. More on this later.

Did you know that Hoyas are actually related to milkweed? Which makes absolutely perfect sense because if you have ever seen a milkweed flower (Monarch butterfly caterpillars only eat Milkweed), you will know exactly what I’m talking about. There is a strong resemblance.

Hoya Carnosa Care

Although Hoyas are not succulents, most Hoyas have very thick, succulent-like leaves. Which is great because it means that they are very forgiving in the home and will tolerate (and even thrive) from some neglect!

Hoya carnosa plants are most often grown in hanging baskets, but these are vining epiphytes so you can also grow them as a floor plant using a support such as a trellis.

To illustrate exactly how easy Hoya carnosa plants are, let me show you my variegated Hoya carnosa that I’ve had in the same pot since I purchased the plant probably around 16 years ago.

hoya carnosa

It is several feet long and I sometimes will give it extra special treatment and will water her, shower her, and let her drip dry in the shower. Otherwise I would be making a big mess in my sunroom where the plant hangs in front of north and east windows.

General Hoya Growing Tips

There are many species of Hoya and some have more specialized needs, however, according to the International Hoya Association, there are a few pieces of generalized advice that apply to ALL hoyas:

  • Don’t grow hoyas in huge pots. They like to be at least somewhat root bound.
  • A well draining soil, such as a good succulent mix, is a good choice for hoyas. More on soil blends later.
  • If you don’t have enough light, your hoya won’t bloom. If you have too much light, your leaves may yellow or burn. Experiment and find a balance!
  • Finally, there is one secret that you may not know that pertains to flowering. Keep reading to find out soon.
hoya carnosa

Hoya Soil

My Hoya carnosa has been in the same pot for 16 years so I haven’t repotted this plant. However since Hoyas are epiphytes, they benefit from a light and coarse potting mix.

Epiphytes really need a lightweight potting mix. There are many combinations that you can use to create this idea potting mix.

Horticulture magazine recommends 2 parts of a soilless mix to 1 part fine grained bark mix as a great option for many epiphytes. In my opinion, this is a great option for more plants that just epiphytes. I have added orchid bark to my soil blends for a while now.

Personally, for other types of Hoyas, I have used a good succulent/cactus mix, to which I have added something “chunky” such as orchid bark, perlite or even pumice.

Adding chunky ingredients to your soil will aerate your soil, allow more oxygen to your plant’s roots, and allow it to dry out more quickly. Epiphytes will love you if you can provide these conditions.

Hoya Light

Hoya carnosa prefers brighter light. If you don’t give this plant enough light, it will produce all foliage and no flowers. This wouldn’t be a huge issue, but don’t you want to see some flowers? They are quite spectacular!

Take a look at the flowers on my Hoya carnosa. Aren’t they stunning??

hoya carnosa

I keep my Hoya carnosa in my sunroom which has a large wall of Northern exposure windows and Eastern exposure windows, as well as a skylight. It receives some direct morning sun and has done very well in this location.

Be careful not to give your plant too much sun otherwise it may start to yellow and potentially burn. My home is not blessed with any good Southern exposure windows.

If I did have some Southern exposure windows, I would place my Hoya carnosa there for sure, with some blinds to diffuse the direct sun a bit.

If you want your hoya to bloom, you must be providing enough light. This is number 1! There are other factors that will encourage your hoya to bloom, but we’ll get there shortly.

Watering Hoyas

You may have heard that you shouldn’t overwater your hoya. Overwatering is a terrible term in my opinion. So much so that I’ve written a blog post on what it really means.

Be sure not to miss my overwatering misconceptions post.

It is probably the one piece of advice that I have given people that has helped them the most when it comes to houseplant care! And it goes well beyond Hoyas!

When I water my Hoya carnosa, or any other hoya that I have, I will water it thoroughly until water comes through the drainage hole.

Discard all excess water. Epiphytes sitting in water will spell death!

After watering, I will wait pretty much until all of the soil is completely dry. In this way, I treat them very much like succulents when it comes to watering (even though Hoyas are not technically succulents).

Some people prefer to wait until the leaves pucker a bit and then water. I know that I’ve done this unintentionally a few times. Clearly, the plant has been with me for 16 years and has not complained much 🙂

If you keep hoyas TOO dry, the lower leaves on the vines will yellow and eventually turn crispy and fall off.

Fertilizing Hoyas

I never fertilize hoyas during the winter months, but will fertilize dilutely with every watering throughout the growing season.

How to Get a Hoya to Bloom

Light is the #1 most important priority! You can’t expect your hoya to bloom in lower light, although the plant will tolerate lower light.

Keeping your plant potbound will help encourage blooming! My hoya carnosa did not bloom for several years, but once it started, it bloomed every single year to some degree.

Once your hoya blooms, be sure NOT to deadhead the flower! The future blooms will grow from the “spurs.” Take a look at what the spur looks like below on my plant:

hoya carnosa

So when the plant is done blooming, just gently brush off the petals or let them fall off. Don’t cut anything off otherwise you will be cutting off where the plant will flower the following year!

Be sure to smell the flowers because they have a delightful fragrance! One time my hoya bloomed and I didn’t even know. I smelled something in the other room, and I probed around the sunroom until I found a spectacular flower on my hoya.

Also, you may notice that the newer vines don’t have any leaves. There is nothing wrong with your plant. This is just how they grow so leave them alone. Take a look at the newer vine below on my Hoya carnosa.

hoya carnosa

Propagating Hoya

Unless you want to propagate your Hoya, I would recommend never cutting any vines off your plants or you may prevent it (or at least decrease) the amount of flowering. I only take dried up vines or leaves off my hoya.

If you do want to propagate your plant, follow these steps recommended by the International Hoya Association:

  • Take a cutting with 2 or 3 leaf nodes. A node is the point on the stem where the leaf meets the stem. Remove the leaves at those nodes. (You’ll obviously want to keep the leaves at the tip of the cuttings)
  • Dip the base of the cutting in a rooting hormone.
  • Place the cutting(s) in a pot of soilless mix to which you’ve added about a third perlite or pumice. (Approximately 2 parts soilless mix to 1 part of perlite or pumice).
  • Water thoroughly and discard excess water. Don’t allow the potting mix to dry out completely while the cuttings are rooting.

I like to use Garden Safe Rooting Hormone that I purchase easily on Amazon.

That’s all folks! Do you have a Hoya carnosa? Comment below! I’d love to hear from you.

There are so many other kinds of beautiful Hoyas to grow, but this one definitely belongs in any houseplant collection.

Please do me a favor and share this post to social media because it will help me spread the Ohio Tropics houseplant care tips to the masses! Also, check out my shop on Amazon for all your houseplant care needs:

OHIO TROPICS PLANT CARE STOREFRONT

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Tara

Monday 23rd of March 2020

Before learning these guys love the crowded pots, I repotted my mature, previously blooming carnosa from a bursting 12 inch pot to an 18 inch and sure enough! Zero blooms last year. It's otherwise very healthy. Would you recommend potentially stressing it and downsizing to a 16 inch,or will she eventually bloom in the 18 inch?

Raffaele

Thursday 26th of March 2020

I think it will eventually bloom in the 18 inch, but it just may be longer. I don't think there is any harm in moving it to a 16 inch pot though!

Margaret

Monday 24th of February 2020

I have to large Hoya Carnosa that are approximately 65 years old or older. I inherited them when my grandmother died approx 30 years ago. They used to bloom profusely multiple time a year but stopped about 10 years ago. All of the flower pendula (?) have fallen off and it never generated new ones. I have propagated at least a dozen plants from the two for family members and all of them bloom regularly. My plants are gorgeous and grow like crazy. What can I do to help them start blooming again? Their light comes from the south east window in my house. I am wondering if it could possibly be to0 warm for them. We have a very warm house in the winter (wood stove) and they set on a china cabinet and cascade down. I would say (as heat rises) the temp can reach 85 degrees at times. Do i need to put them in a cooler location? We moved approx. 7.5 years ago. These plants have always had south to southeastern lighting. They are beautiful as is but I really miss the blooms and the beautiful perfume fragrance they emit at night.

Raffaele

Saturday 29th of February 2020

Hi Margaret! Wow, what a treasure to have a 65 year old plant! If the plant has been in the same location all those years and the light didn't change, I would try the following. Give your plant an extended dry period right now for about a month or so. Keep an eye on it so it doesn't suffer too much. It may start to wrinkle a bit, but it's ok. Then start watering it again like normal after about a month or so, and resume normal watering. This can often kick start your plant into bloom. You can also start fertilizing with a bloom-booster type fertilizer in the Spring. 85F should be fine, but does the temperature drop in the evening? A drop in temperature at night is also beneficial. Hope this helps!

Tammy Hughs

Sunday 16th of February 2020

My neighbors friend just brought me 2 cutting of a Hoya .. I'm so thankful .. I have always wanted another one. I had one years ago, then I moved from my house after selling it I have no idea what happened to it. The 1 that was jyst given to me is in a glass jar in water is it ok until pay day on the 3rd if March? I don't want to loose it. Please help!

Raffaele

Monday 17th of February 2020

Hi Tammy! It will be fine in the glass jar of water. You can also place it directly into soil and keep it humid and should root. Sometimes Hoyas can take a long time to root so you'll have to be patient!

Terri

Friday 31st of January 2020

I now have a hoya that has been past down 3 generations, she is approximately 70 years old. Since I have had her she has only bloomed once. I was wondering if I can feed her the liquid Alaska salmon fertilizer?

Raffaele

Tuesday 4th of February 2020

Hi Terri. Wow! 70 years old! Yes you can absolutely try the fish emulsion fertilizer. That's a wonderful fertilizer. I hesitate to use it indoors because of the odor. I know there are deodorized ones though. To encourage it to bloom, try giving it a very dry period of a few weeks this winter. Keep an eye on it so it doesn't suffer too much, and then resume watering after maybe 4-6 weeks. This may kick it into flowering later in the Spring or Summer. Hope this helps!

Ruby

Sunday 24th of November 2019

what do you mean by soillRubyess? ty

Raffaele

Monday 2nd of December 2019

It's just a fancy term for what is normally sold for houseplants. Here is a reference: https://www.finegardening.com/article/choosing-the-right-soilless-mix