Hi all, I DIDN'T have time this year (we had just moved into this house in February) to plan and grow a big garden. My goal is to go all heirloom, but I don't know enough about them. My past garden experience has been the typical hybrid "burpee" type plants or starts of hybrids sold locally. Am I correct in understanding that an Heirloom plant is only self-fertile and won't/can't be hybridized? I mean if I get 12 varieties of heirloom tomatos next year will they cross and mess up my seeds for the next year or do I have to have some serious seperation between the two? I need a lesson in heirlooms from those who grow them exclusively. I am in NE Ohio my zone could be called 5.5 Forgot to add that the small raised beds I DID grow are doing fabulous. My tomotoes are weeks ahead of others in the area and very big. I had scads of 5 year plus composted horse manure sitting around here.