What spacing for tomato plants in a greenhouse?
I've had a "garden structure" in mind for a while that I can also use as a greenhouse. I do Square Foot Gardening, so I'm used to planting 1 row of tomatoes at the back of each 4x4 planter, with 1 foot spacing.
If I'm going to plant tomatoes for growing thorugh the winter, what *row* spacing can I get away with without the plants shading each other too much, or is this even an issue.
BTW, I know there are a lot of other greenhouse issues with growing through the winter, but I'm researching those.
Thanks in advance for the help.