I have a large vegetable garden in mid-PA, I love to grow tomatoes(both heir loom and hybrid). My problem is the last two years, my plants produce maybe one large crop then they seem to die off. I mean they actually turn brown and the leaves start to dfall off, bu they still have some fruit on them. I water them daily in the am (one inch of water). We do put down weed block, but it is the kind that allows water to go through. We move them around in our garden, never in the same spot twice. I am at a loss with this, I remember my grandparents always have nice green bushy tomato plants, but mine seem to be spindly and brown. HELP!