TomatoTango said: If you're worried about disease and rain then stick with hybrids.
Having grown tomatoes for around 50 years, beginning with hybrids and moving on to OPs and heirlooms, I take exception to this statement. Disease does not differentiate between hybrids and OPs. It is more the growing methods used and cultural practices. A good mulching program and disinfection has more to do with disease control.
The worst years of tomato growing was when all that I planted were hybrids. Does that mean hybrids were the culprit? No, it was the way I grew tomatoes. Over those many years, the most disease free plants were OP/heirlooms. The old wives tale that hybrids are more disease free is a fallacy. Some are bred to resist certain pathogens, but that is only a delay and meant for large scale farming where two or three days means keeping the farm or not.
In the home garden a few extra days is not even noticeable. I have not lost a plant to disease in more than 15 years. Granted I only grow around 35 plants per year but my record is pretty good. It takes very little time and effort to disinfest cages. If your plants show any sign of wilt or blight by the end of the season, that is reason to use bleach on the cages. Pathogens are in every soil in every location and will cling to and move up a cage to infect plants. Strong plants will resist these diseases longer, most for the entire growing season. Plants with mulch to keep the leaves off the soil will be stronger and last longer.
Wet weather will adversely affect any tomato plant and the fruit it is trying to produce. Hopefully this year will be better. Grow whatever you like best; any home grown will always be better than a store bought. Personally I will never go back to round, red, boring, (and for me, disease ridden) hybrids. Sometimes it is an adventure, but always fun.
