The black-eyed Susan is a robust climbing plant that suffers less from diseases and more from pests. Location and care errors are almost always responsible if the flower does not bloom or has yellow leaves.
What diseases occur in the black-eyed Susan?
The most common diseases and pests on the black-eyed Susan are powdery mildew, root rot, aphids and spider mites. To prevent this, the plant should receive enough light, the soil should be kept moderately moist and there should be enough space for air circulation.
Potential diseases and pests
- Mildew
- Root rot
- Aphids
- Spider mites
Wrong location
If the Black-Eyed Susan isn't blooming, it may not be getting enough light. It needs at least three hours of sunlight, especially during the flowering period.
If the location is too cold, this also affects the black-eyed Susan. It will then remain rather small and you will probably wait in vain for flowers.
Do not plant or place the climbing plants too close together. The air must be able to circulate. Otherwise, mildew and pests will spread to the leaves.
Poor care
The soil in the garden or pot must always be moderately moist. As soon as the soil surface is dry, the black-eyed Susan needs water. Make sure that water can drain away easily so that no waterlogging occurs.
If the leaves start to rot, the soil is probably too wet. Provide better drainage to prevent root rot.
If the leaves turn yellow and fall off, you should check the black-eyed Susan for spider mites and treat an infestation immediately.
Pest infestation during wintering
Pests cause problems for the black-eyed Susan, especially when overwintering indoors.
Before bringing the plant indoors, check the leaves for aphids and spider mites, both on the top and bottom of the leaves.
Eliminate the pests with soapy water or other suitable means. Chemical agents that you can get from gardening stores often help with spider mites.
Do not put plants with pest infestation in winter quarters
In warm rooms, lice and mites spread particularly quickly and also attack other plants.
Either place an infected black-eyed Susan separately or dispose of it and sow new plants next year.
Tips & Tricks
Strong plants cope better with pest infestation than sickly ones. Feel free to give the Black-Eyed Sun some horn shavings (€52.00 on Amazon) to improve soil he alth. This strengthens the climbing plant and prevents it from being overburdened by lice and mites.
