Fungal disease
Tomato Leaf Mold
A fungal disease of tomatoes grown in humid conditions, especially greenhouses, with mould under the leaves.
Symptoms
- Pale yellow spots on the upper side of leaves
- Olive-green to brown, velvety mould on the underside
- Leaves curling, withering and dropping
What causes it
The fungus needs very humid air and spreads in poorly ventilated greenhouses and tunnels.
What you can do
- Ventilate well and reduce humidity, especially at night.
- Space and prune plants so air can move between them.
- Remove badly affected leaves with clean scissors and bin them rather than composting.
- Choose resistant varieties for greenhouse growing.
Not sure it's leaf mold?
Photograph one affected leaf and Plantulus will suggest the most likely problem, with a confidence score. It's free and needs no sign-up.
Check a leaf photoOther tomato problems
General guidance only, not a diagnosis. Check product labels and local rules before using any treatment, and ask a horticultural specialist if a valuable plant is struggling. See the disclaimer.