Hibiscus plants are common garden plants that can also be grown indoors. Many gardeners like hibiscus because they are hardy plants, and many varieties of the hibiscus can survive colder weather. Identify problems with a hibiscus plant as soon as possible and make sure that the plant is treated for any issues. Yellow leaves on a hibiscus can point to several problems, and treating them as soon as they are diagnosed will help the hibiscus return to health.
Causes of Yellow Leaves on Hibiscus Trees
Check the hibiscus plant for signs of pest damage, include insects and fungal problems. Indoor hibiscus plants are susceptible to mites, which can sap nutrients from the plant and turn the leaves yellow. Fungal problems can turn the leaves yellow and leave spots on the leaves or stems of the plant.
Issues with the amount of water the hibiscus receives can also cause the leaves to turn yellow. As the plant grows and the seasons change, the amount of water requires to keep the tree healthy varies. Too much or too little water will cause the leaves to yellow or drop.
Pest and Fungus Problems of Hibiscus
Apply a fungicide or pesticide to the hibiscus plant if any pests or fungi are found. This will help control the problem and restore the hibiscus plant to health. The best pesticides to use for hibiscus are insecticidal soaps that can be applied to the leaves and stems of the plant to control pest problems.
Remove any leaves affected by fungal problems to stop the fungus from spreading to the rest of the plant or other plants. Dispose of the affected leaves immediately. If the hibiscus has fungal problems, use a fungicide that is formulated specifically for the type of fungus affecting the plant.
Where to Grow Hibiscus Plants – Yellow Leaves on Hibiscus
Change the location of the hibiscus plant if it is in a planter. Hibiscus plants kept in full shade are not able to process nutrients properly and may have yellow leaves. Hibiscus trees that are in full sunlight can become scorched and dried out. Move the hibiscus to an area where it receives partial sunlight to help keep it healthy.
Use a balanced, time-release fertilizer that can be applied to the soil every two months. The proper amount of fertilizer will help keep the hibiscus healthy and prevent its leaves from turning yellow. Water-soluble fertilizers can also be used, although these need more frequent application.
How to Water a Hibiscus With Yellow Leaves
Alter the amount of water the hibiscus receives. Both too much and too little water can cause the plant to become stressed, which can result in yellowing leaves. Make sure the soil is draining properly. The soil around the hibiscus should be moist, but not saturated with water.
Water the plant only enough to keep the top portion of the soil moist if the leaves are yellowing in the fall. The plant is attempting to become dormant and requires less water; too much water can kill the plant during its dormant period.
Water the plant so that the soil is moist throughout the planter, if the hibiscus is in a planter. Water the plant daily and allow only the top half-inch of soil to dry out between periods of watering. Water the hibiscus daily if it is outside.
Prune Hibiscus Trees with Yellow Leaves
Cut off any branches of the hibiscus tree that show excessive damage. Prune the leaves at the nearest healthy branch or the trunk of the hibiscus tree. Make a 45-degree angled cut to reduce damage to the tree. Hibiscus trees benefit from regular pruning throughout the year, although any heavy pruning should be done in early spring before the plant begins producing buds.
Cut branches from the top of the tree as well. This allows light to penetrate to the lower branches of the tree and encourages new, healthy growth. Prune any straggling or uneven branches to maintain the appearance of the hibiscus tree.
A hibiscus with yellow leaves is not a doomed plant. Quick action from a gardener to determine the cause of the yellowing leaves can bring a hibiscus plant back to full health and ensure that the tree continues growing strong and healthy.