Plant Profile: Rhododendron x hybridum 'Glenn Dale'

There is a wide variety of cultivars and colors available, and these plants are known for their cold tolerance.

Wildlife Value: The genus Rhododendron is known to support the specialized bee species Andrena (Andrena) cornelli.

Insects, Diseases, and Other Plant Issues: Rhododendrons are prone to various insect infestations and diseases. Common insect pests include aphids, borers, lacebugs, leafhoppers, mealybugs, mites, nematodes, scale, thrips, and whiteflies. They can also suffer from diseases such as canker, crown rot, root rot, leaf spot, rust, and powdery mildew. Exposure to full sun can lead to leaf scorch, while poor soil drainage can cause root rot. However, with proper care and placement, a healthy plant typically experiences minimal issues. Additionally, deer often cause damage to these plants.

Growth Habit: They can grow in an upright or spreading form.

For further details on Rhododendron, please refer to additional resources.