Hi,
I wondered if anyone could lend a hand with identifying a problem with my tomatoes... I'm growing a range of different varieties, all are in a mini greenhouse type of structure, so it's unheated but can become quite humid. The lower leaves have turned very dark, especially around the edges and nearly all the leaves on each plant near the top are speckled white/very light green. If I didn't know better, they'd almost look like a variegated leafed variety! I suspect this could be a common problem seeing as all my varieties are affected, but if not I'll add some photos.
Hope someone can help. Thanks!