Well I am using pots, so space is technically unlimited.....but, can I keep them thriving in pots is another question! I think I am going to look for a heat resistant variety and give it a go for later in the season.
From what I have read our maters will not begin to fruit until nights get above 55..... The count of days until harvest begins then. So far I have flowers but night time temps are still too cool for pollination. Most of what I read also seemed to indicate that production (in our area) would start up in July and peak in aug, then peter out. So a few heat resistant varieties should keep us in fresh maters thru nov. It has been a couple years since I had a real garden but it seems to me that all the tomatoes were done before that. Guess I need a garden journal too.