tomatoes- heirloom or f1?
Can anyone tell me of their experience with growing both types here in the UK? I'm in the north west, last year I had a really beautiful crop of Shirley and Gardeners delight, both F1, grown outside, they stayed healthy and we picked last ripe tomatoes in the beginning of November! Being new to the whole thing and encouraged by last year's success I thought I'd try heirloom tomatoes (I love the idea of being completely self-sufficient), but I'm worried about their resistance to diseases? Do you have any recommendations for both outdoors and greenhouse?