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How to Get Hoya Plants to Bloom: 5+ Epic Tips

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Are you struggling with getting your Hoya plants to flower? This post will be the ultimate, practical guide that you need to finally getting your wax plant to bloom. The answers will be surprisingly simple, with concrete, actionable advice, so keep reading to discover exactly how to get Hoyas to bloom.

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Regardless of the species or cultivar of Hoya that you have, these tips will apply. The Hoya genus contains approximately 545 species.

Some common names for Hoya plants include wax plant and porcelain flower. Native to several countries in southeast Asia and the West Pacific, this tropical plant is well adapted to grow indoors.

Most have thick, waxy leaves and the star-shaped flowers are stunning, coming in various colors such as red, orange, pink, red, green, yellow, and white. Many of them have a beautifully sweet fragrance as well.

HOW TO GET HOYA PLANTS TO BLOOM

Here are the main factors to encourage Hoya flowers:

Hoyas are one of the best indoor plants to grow, and providing the right conditions for your Hoya will result in the best flower show possible. Here are some very important tips on getting your Hoyas to bloom:

1. BRIGHT LIGHT IS REQUIRED

The most important factor to trigger Hoya flowers is to ensure that you have sufficient light levels. The common (but very vague) advice is to provide bright indirect light in order to encourage Hoya blooms. Practically speaking, what does this mean?

Like any flowering plant, light is of paramount importance, and if you have your plant in low light conditions, your Hoya will refuse to bloom. And there isn’t as much light indoors as you think.

Here are some tips on situating your Hoya in your home in order to help trigger your plant to bloom:

  • Always have your Hoya plant immediately in front of a window. Light intensity decreases dramatically even 1-3 feet away from a window.
  • Depending on where you live and how large your windows are, and if there are any obstructions such as trees, a window with no direct sun at all may not be enough. Consider an unobstructed East-facing window that provides a few hours of gentler morning sun. A West-facing window that gets late afternoon sun is also great. Windows that get full sun all day may be too much, unless you live in an area with dark winters, in which case, your plant will appreciate the additional light during the winter months!
  • Do you want a more objective way to measure light? Invest in an inexpensive light meter. The University of Florida recommends light intensities of 1500-2000 foot-candles of light for best plant development.
  • If you are blessed with windows that get a lot of direct sun most of the day, you can gently diffuse the light with a sheer curtain if you need to.
  • If you don’t have any good windows available, a simple solution to resolve low light situations is to use grow lights. You can use artificial light to supplement your natural light in front of any windows, or you can place your grow lights anywhere you’d like to grow your plants in your home. Hoyas will grow beautifully and bloom well under grow lights. Keep the grow lights on at LEAST 12 hours a day. If you want to encourage blooming, keep them on for 14-16 hours per day.
  • During the summer months, if you have any shady outdoor spaces, it will benefit your Hoya to spend some time outdoors. Wait until evening temperatures are at least 55°F (13°C) consistently, and place your plants in complete shade outside. Remember a shady location outside is probably higher light than most locations inside your home. Dappled sun under a tree would be a perfect location. Be careful with direct sun exposure outdoors. They can take some sun outside, but you will need to acclimate your plant slowly enough so that it doesn’t burn. Check out my blog post on acclimating your plants to the outdoors so that you avoid burning your beloved plants.
  • Your Hoya plant will definitely survive in low light, but don’t expect it to bloom (or grow much) in lower light conditions.
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My blooming Hoya pubicalyx

2. YOUR HOYA PLANT NEEDS TO BE OLD ENOUGH

The age of your Hoya plant will definitely affect if it is ready to bloom. The International Hoya Association states that many species of Hoya will bloom in their first year of growing, but others may need 2-3 years or more before they are mature enough.

However, if your growing conditions are not good enough (namely light), your Hoya may never bloom even if it is old enough.

3. FERTILIZATION FOR THE MOST FLOWERS

Using a well-balanced fertilizer is an important part in your Hoya’s health and will also affect flowering. One of my favorite liquid fertilizers is Dyna-Gro Grow (link to Amazon) and I use this on all my Hoyas plants.

It is a nutritionally complete fertilizer and it contains all of the macro and micro nutrients need for your Hoya to thrive. It is also urea-free so it will not burn your plant if you use it as directed on the label.

I like to fertilize with every watering (dilutely). This way I don’t have to remember when I last fertilized. I simply use 1/4 to 1/2 teaspoon of Dyna-Gro Grow at every watering when my Hoyas are actively growing.

If you think that your light conditions are good and you’ve been using a balanced fertilizer and still have no flowers, try alternating applications of your normal fertilizer with a bloom booster fertilizer (you can identify these because they have a higher middle number).

A good choice would be Dyna-Gro Bloom (3-12-6) for an extra boost of phosphorus that can help trigger your plant to produce more flowers.

Fertilizing is extremely important particularly if your Hoya has been in the same pot for many years. If your plant is pot bound and has been in the same pot for quite a few years, it is probably in desperate need of nutrients.

If you have gone years without fertilizing, your plant will eventually suffer and may start to exhibit nutrient deficiencies. The International Hoya Association gives the following guidance as far as what nutrient deficiencies may look like in your Hoya.

  • Nitrogen deficiencies can manifest themselves as older leaves looking sad, pale and yellowish and may even drop off the plant. Growth will also be slow and stunted.
  • Phosphorus deficiencies first manifest themselves in the leaf edges. The edges will turn a reddish or bronze color on the older leaves, and new growth will be stunted or even stop. Leaves will start to turn into a blue-green color with purple/brown/yellow mottling on the leaves.
  • Potassium deficiencies will result in the leaf tips and edges turning a bronze or reddish color and edges will eventually look brown and burned. New growth will also be stunted.

If your plant has become really nutrient deficient, start fertilizing regularly. It may not come back as beautifully as it once was, but it should help.

It is best not to get to this point, however, so be sure to fertilize regularly before you start to see any of these severe issues. Dyna-Gro Grow contains all the nutrients that your Hoyas need to thrive, so make it part of your plant care routine.

Macro nutrients like Nitrogen, Phosphorus and Potassium are very important, but so are the trace nutrients that are needed at much lower levels, and Dyna-Gro Grow has them all.

You can also fertilize your Hoya plants by foliar feeding. Many Hoyas grow as epiphytes in nature and they absorb many nutrients through their leaves.

You can mimic this by using Dyna-Gro Grow to spray your entire plant with a fertilizer solution. There is a recommended concentration on the label that you can follow.

4. KEEP YOUR HOYA ROOT BOUND

Generally, plants will produce more flowers when they are fairly root bound, so avoid overly large pots. When it comes time to repot your Hoya, I recommend that your new pot should only be 2 inches in diameter bigger than the old pot and no larger.

For example, if your Hoya is currently in a 4 inch diameter pot, only go up to a 6 inch diameter pot and no bigger.

The best time to repot is when your Hoya is just about to start into a period of active growth (most times, this will be around early spring), although they are resilient and can be done anytime that you need to.

Another reason not to use pots that are too big is that the excess volume of soil will take too long to dry out, particularly if your plant is sitting in lower light.

Always use pots with drainage holes. Hoyas demand excellent drainage, otherwise excess water accumulating in your pot will cause root rot.

Always use a well-draining soil. A good potting mix blend for Hoyas that I like is two parts of a good all-purpose potting mix and 1 part of 1/4″ horticultural pumice.

5. CONSIDER A DRY REST PERIOD

If all else fails, you can try providing a dry rest period in the winter time. I did this with my Hoya carnosa one year and it worked. If your Hoya species is supposed to bloom in the Spring, give it a 4-5 week dry period in the winter time. Sometimes this will help to trigger blooming.

OTHER IMPORTANT CARE TIPS FOR HOYA FLOWERING

PRUNING

Should you be pruning your Hoyas? First off, Hoyas will rebloom every year from their bloom spurs. After the petals fall off, the spur will remain and it will bloom in that exact location the following year.

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A flower spur on my Hoya shepherdii

However, if you want to sacrifice some flowers temporarily and give your plant an opportunity to really provide a huge show of flowers, go ahead and prune your plant up a bit.

Pruning your Hoya will force a lot of new vines to grow, and create a bushier, fuller plant with a lot more flowers.

HUMIDITY

Hoyas are very resilient when it comes to humidity levels, but they will grow and bloom better with adequate humidity levels. Try and maintain humidity levels of 40-60% for best results.

If your humidity is too low, particularly in the winter time the tips of your vines can appear to burn and your plant will also be more prone to spider mites.

Combat that air dry with a good humidifier. Your plants and your skin will benefit!

SEASONALITY

Depending on the Hoyas species, they will bloom at different times. While some can bloom year-round, some only bloom in Spring or Summer, while others will flower in Fall or Winter.

Do your research so you know what to expect for your particular plant.

TEMPERATURE

If you keep your Hoyas too cool, growth and flowering may be reduced. An optimal temperature range to grow Hoyas is 68-75°F (20-24°C), which is basically room temperature in any home, so this shouldn’t normally be an issue.

I hope you’ve enjoyed this post on how to get Hoya plants to bloom. Do you have any blooming Hoyas? Comment below. I’d love to hear!