Hoyas are lovely houseplants that come in various shapes, sizes, and colors, but whatever type, this plant always looks stunning. What makes Hoyas so wonderful is that they are approachable houseplants that are easy enough for a newbie but still present a challenge to a seasoned pro. The one potentially tricky aspect of Hoya care is humidity. Proper humidity makes all the difference when it comes to Hoya care, and here is what you need to know about humidity for Hoyas.

Native Habitat

The ideal environment for Hoya houseplants will mimic what the plant experiences in nature. Hoyas naturally grow in tropical and subtropical climates, so they evolved to thrive in high humidity. These plants have transitioned to living indoors, and while they are adaptable, they still need extra dampness in the air.

Hoyas are epiphytic plants, which means they grow on trees in their native habitat. The stems reach along trees and latch on, securing the Hoya to the tree trunk. The ability to climb allows a Hoya to elevate itself above nearby plants and seek a better position to soak up sunlight. Epiphytic plants have roots but often do not rely on their roots as much as non-climbing plants. For this reason, Hoyas get a lot of the moisture they need to live through humidity and are sensitive to overwatering.  

Idea Hoya Humidity

Hoya houseplants need 60-80% humidity. Some cultivars can survive in 40-50% humidity, but there is a difference between surviving and thriving. High humidity encourages growth, and cuttings are more likely to root in a high-humidity environment. If you want your plant to grow full, lush, and bloom, ensure the humidity is over 60%.

Impacts of Low Humidity on Hoyas

Plants grown in low or medium humidity will experience stunted growth and will not bloom. Hoyas only bloom when the conditions are just right and humidity less than 60% is insufficient. The leaves will dry out and become crinkled and yellow or brown when the air is exceptionally dry.

Water and Humidity 

Wrinkled leaves also occur when a plant is underwatered. Hoyas are semi-succulents that store water in their thick, waxy leaves. The foliage will become shriveled and wrinkled as the plant dehydrates and uses up the water stored in the leaves. If you catch a dehydrated plant early enough and give it water, it will likely bounce back. Consider all possibilities if you notice wrinkled foliage. Check the soil to determine if the plant needs water and monitor the humidity in case that is the culprit.

On the topic of watering Hoyas, overwatering does not compensate for low humidity. Increased water is not the same as increased humidity.

Help Your Hoya Thrive

The easiest way to gauge the humidity in your home is to monitor the plant. If the plant is happy and growing, you know the humidity is acceptable. If the plant shows signs of low humidity damage, you know you need to increase the dampness. 

A better approach is to proactively measure the humidity so you can fix the problem before the plant becomes stressed. Measure humidity using a hygrometer. Many digital hygrometers are available that quickly and easily give a reading. Once you have that information, you can adjust your Hoya care to serve the plant best.

Can I Mist My Hoya?

Misting houseplants can be helpful, but it depends on the type of plant. Non-succulent plants are often good candidates for misting, while it is often best not to mist succulents and plants with fuzzy, textured leaves. Hoyas are semi-succulent.

The trouble with misting houseplants is that it can keep the potting soil damp. Succulents and semi-succulents prefer to dry out between watering, and wet soil is conducive to root rot and fungus. It can be beneficial to mist the foliage but avoid misting the potting mix. The Hoya linearis is one variety that thrives when regularly misted, but take care to only spray the foliage.

Misting can be risky, depending on the technique. Err on the side of caution and increase the dampness by using a humidifier or pebble tray with water. If you mist your Hoya, do so early in the day so the water droplets have time to dry. Avoid misting in the evening because the lack of sunlight and often cooler nighttime temperatures can lead to soggy conditions and support mold and fungus growth.

Hoya Humidity Care

Understanding the plant’s background enables you to make better-informed decisions about plant care. Humidity can be hard to master, and many plant owners struggle with this element of Hoya care. Stick with it, and you’ll learn what your Hoya needs to thrive in your space.