I've always grown tomatoes on my south facing patio in the fresh air. All grow well with no disease problems. Last year I had a plastic
greenhouse on the patio so tried some in the
greenhouse and the others in the fresh air as usual. The
greenhouse ones fruited slightly earlier but also got blossom end rot which I've never had before. I grow in balconiers - wicking containers and they definitely didn't dry out. Not going to bother putting tomatoes in the
greenhouse this year. As to varieties, I like a cherry tomato and usually grow determinate varieties as I never managed to work out how to build supports on the patio. Last year I grew Roma plum cherries, only about two thirds of the plants ended up with
fruit that were considerably larger than a cherry, in fact, I'd say normal sized plum tomatoes, so not quite sure what happened there! However, the cherry tomato plants produced absolutely delicious little tomatoes. I saved the seeds from those and sowed them a few days ago and already they have popped up. This year I'm growing Sunstream, which is a cherry tomato recommended to me as a good cropper and tasty, and the seed saved Roma cherry tomatoes. Let's see if the Roma seeds produce cherries or full-sized tomatoes! I did buy a pack of Sungold but they're silly expensive here and they're hybrids - the googles imply that no-one has managed to crack the hybrid code of Sungolds and reliably produce from saved seeds. I just like the idea of
landrace tasty tomatoes so tend to avoid commercial hybrids. That said...I ought to sow the Sungolds seeing as though I bought them....!!
Michael...we're geographically close as I'm in South East London so may have similar weather although I am in a
city, if you want to experiment with different varieties this year and want some of the Roma seeds saved from last year just PM me. They are indeterminate vining plants (actually the packet said "semi-indeterminate" and "can be grown like a determinate" but the packet lied!). This year I'm trailing those twisty metal tomato spikes for supports as the Romas trashed the Lidl self-watering tomato tubs with built in cages last year!