How to Grow and Care for Weigela Shrubs Weigela spp.
12.08.2024 - 17:58 / gardenerspath.com / Kristine Lofgren
11 Reasons (and Solutions!) for Yellow Hibiscus Leaves
Unlike humans, plants don’t have an easy way to tell us gardeners that they are stressed.
We have to watch carefully for the signs, and one of the most obvious indicators your hibiscus (Hibiscus spp.) shrub isn’t happy is yellow leaves.
If you see yellow leaves on your hibiscus plant, it’s definitely trying to tell you that something is wrong.
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Identifying this particular stress sign is easy, the hard part is narrowing down the cause.
In this guide, we’ll chat about 11 common causes of yellow hibiscus leaves and how to figure out which one is causing the problem so you can get to work fixing it.
Here’s what we’ll cover:
Why Hibiscus Leaves Turn YellowMany causes of yellow leaves on hibiscus are environmental, meaning issues like over- or underwatering, lack of nutrients in the soil, temperature, or sun exposure.
The good news is that most of these can be resolved.
In this guide, we’ll discuss tropical hibiscus (H. rosa-sinensis) as well as hardy hibiscus (H. moscheutos), and the lovely rose of Sharon (H. syriacus).
Let’s talk about what temperature can do to our plants.
1. Cold ExposureOne of the first signs of cold damage is yellowing leaves. Tropical hibiscus (H. rosa-sinensis) is happiest in temperatures above 55°F, though there are cultivars that can tolerate temperatures a bit lower.
If the air temperatures dip into the 30s, your shrub could die.
Hardy (H. moscheutos) and rose of Sharon (H. syriacus) are both more tolerant of cold than tropical types. They can survive temperatures down to 20°F and -10°F respectively.
Cold damage on hibiscus looks
How to Grow and Care for Weigela Shrubs Weigela spp.
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