Learn how to identify common marigold pests and diseases, understand yellowing leaves, root rot, and fungal problems, and help protect your plants.
Marigold Leaves With Holes: Finding the Cause Holes in marigold leaves are most often caused by a chewing pest — caterpillars, slugs or snails, flea beetles, or earwigs — and the shape of the holes usually points to which one …
Aphids on Marigolds: Safe Ways to Manage an Infestation Aphids on marigolds are small, soft-bodied insects that cluster on buds, new growth, and leaf undersides, feeding on plant sap. A small group is usually easy to manage: a strong spray …
Powdery Mildew on Marigolds: Identification and Care Powdery mildew on marigolds shows up as a white or grey powdery coating on the leaves, usually starting on the upper surfaces of older leaves. It is a fungal problem, but it rarely …
Why Are My Marigold Flowers Turning Brown? Marigold flowers turning brown are most often a normal sign that a flower is finished. Each bloom fades and dries as it ages, turning brown from the edges inward, and the plant then …
Marigold Root Rot: Symptoms, Causes, and Prevention Marigold root rot is what happens when marigold roots sit in wet, airless soil for too long and begin to decay. The roots can no longer take up water and nutrients, so the …
Common Marigold Pests: How to Identify and Manage Them Marigold pests are usually a small group of familiar insects and mollusks: aphids, spider mites, whiteflies, slugs and snails, caterpillars, and thrips. Most marigolds stay fairly healthy, and a pest problem …
Why Are My Marigold Leaves Turning Yellow? Marigold leaves turning yellow usually mean the plant is stressed, not that it is dying. The most common causes are watering problems — too much water or too little — followed by low …