I have planted out some lettuce and brassica plants from the greenhouse (not in the same bed) and some of the leaves have gone a very pale, almost white colour. I've never seen this before - any ideas? We have had a few cold nights.
I think you have answered for your question...quite likely the cold..
I am sorry the picture isn't very good but this was one of my dwarf french bean plants last year. The leaves were a lovely deep green colour when I planted them then after a day of being in the cold they turned white. The plant did survive and produced many more green leaves later on.
(http://i255.photobucket.com/albums/hh131/jazzbyrd/whitebeanleaves001-1.jpg)
Thanks for that pic Duke, my french beans look exactly like that, I won't worry now!
Yes I guess it must be the cold, it only occured to me as I was writing the post. I expected the cold to do even more damage which was why I wasn't sure - spuds are in a much worse state but seem to be recovering. Greenhouse full of beans waiting to go out - maybe another week.