Calabrese in my polytunnel

velma mercer asked 14 years ago

I bought calabrese plants and planted them in my polytunnel , about 4 weeks ago. They have grown well but the leaves are loosing colour, becoming spotted and slightly pale or yellowish looking. Is this normal, are they thriving or dying?

1 Answers

Gerry Daly Staff answered 5 years ago
It is not normal that the leaves are spotted or yellowish. In a tunnel, this might be caused by intermittent drought. Outdoors it could be caused by cabbage root fly, which is unusual in a tunnel, but not impossible, especially if the doors are open quite a lot to admit the flies. If the plants wilt, it is a sign of cabbage root flies and the grubs can be seen on the roots.