I have tons of Gardeners Delight tomatoes growing in the greenhouse but they are small and getting smaller, when ripe, and now seem a bit soft. Occasional ones split. The plants got baked in the very hot weather earlier in the summer. But I can’t decide if they need more water, less water, more tomato feed or what. The leaves are very brown and veined on two of the plants. I have been watering them every day when it’s v hot and every second day when less hot. I gave them Epsom salts for a mg feed in the past but it didn’t seem to help the yellowing veined leaves. Any ideas? There are 4 plants I could maybe treat each one differently.