Dhalia

[Paulo]

I have a Dhalia (Langstaff) in a pot. Now all the leaves are covered in a dusty thing....fungus? Is it normal for Dhalias to have this problem? Anyway to prevent it?

[Tom Randy]

Powdery mildew. Not much you can do now about it. A fungicide next year when the leaves emerge. Try Organicide next year.

Tom

[Paulo]

Thanks Tom. Should i cut it now or wait until the first frost? (It looks awful...)

Thanks again

[Cereus-validus]

Dhalia and Greggia?

Do you mean Dahlia?

Not a good plant to grow in pots because of the tuberous roots. If the leaves have mildew its because the plants have been kept too wet in a humid atmosphere. Give them moving air.

[Paulo]

Greggia? The plant is in the balcony, a lot of wind there...but we are having a very humid summer. I have to keep it well watered or the leaves look wilted. At the beginning of the summer looks beatiful...but not anymore

[Tom Randy]

You can do either but don't compost the infected leaves.

[starlord]

leading e-list for Dahlia people.