Q.cauliflower seedlings curling up
Cauliflower seedlings curling up and brown/grey – why? The leaves at the bottom of the stem over the last six weeks have been turning brown/grey and then curling up and becoming lifeless. They were potted into compost after purchase from Aldi.
I believe that your cauliflower seedlings have downy mildew. The following article will give you more information on downy mildew along with a course of treatment: