Geraniums are mostly pest and disease free. There are, however, a couple of insect pests to watch out for, and in the main, Vine Weevil, both adults and larvae, have the potential to cause the most damage.  Adult Vine Weevil will damage foliage by leaving notches in leaves, and the larvae will eat the plant’s roots.

Geraniums can also be affected by both powdery and downy mildews. These are usually caused by environmental factors such as humidity and water stress. Generally, mildews can be rectified by removing affected foliage and ensuring the geranium is planted and cared for appropriately.

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