Sorry to hear about this! I had the exact same thing happen to me last
year with a new pop up plastic greenhouse. I put one of the spotted
leaves in a ziplock bag and took it to a local nursery. The person
there said it was a virus and to strip all the diseased leaves off. Let
me tell you, by this time I had some pretty scraggly plants. In the end
I put the plants outside and took down the greenhouse. The plants never
really caught up growth or production wise.

This year I skipped the house and my plants are much happier even with
our cool foggy weather here.

Hope you fare better!

marcella

In article ,
TomatoBecky wrote:

I have a plastic greenhouse containing cucumbers, courgettes and three
types of tomoatoes; plum, golden and russian black. Everything was
going well until last week when some of the leaves on my tomoato plants
have started to go get black spots on them. The spot spreads and then
the leaves die off. This is now affecting some of the side shoots and
is working it's way up the plant. It seems to have spread and my
cucmber leaves are starting to die off. I regularly feed the plants as
the tomatoes now have small fruit on them. I water them once per day in
the evening but it is very humid in there at the moment. The plants are
in grow bags and I live in the North East of Scotland. I am not sure if
that has anything to do with it! Any comments would be greatly
appreciated as I will be a bit gutted if I lose everything!