I am aware that tomatoes will sometimes cross-pollinate with each other if they are in a close proximity. This, of course, will hybridize your heirloom plants with each other.
My question is, do the plants really have to be 50-100 ft. away from each other (as many of the FAQ's suggest) or can they be in the same home garden and be just fine? I ask because I want to save the seeds from my Brandywines, but I have no idea if they have cross pollinated with my hybrid, retail, varieties. Has anyone here grown different varieties in the same garden and not had any trouble with hybridizing?