What spacing for tomato plants in a greenhouse?

advisingelf(7)April 17, 2008

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.

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for greenhouse tomatoes, at least in commercial structures, the winter spacing is 20% more than in summer.

    Bookmark   April 17, 2008 at 6:25PM
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What's the summer spacing?

Maybe I should clarify my question a little more.

I grow my tomatoes vertically at the back of my 4x4 planter beds, 4 plants in one row, 1 foot space between each. When I go to plant them in the greenhouse, I'll have two 4x16 (or longer) beds, and I want to plant as many rows of tomatoes as I can. What space between the rows can I get away with without them shading each other?

    Bookmark   April 18, 2008 at 9:06AM
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With a goal of maximum fruit production per square foot of greenhouse area, many research trials have been conducted comparing different spacings. Having more plants does not necessarily produce more fruit, per area. The optimum for indeterminate greenhouse varieties of tomato is 4 sq. ft. per plant summer, 5 sq. ft in winter. Closer spacings have more plants, but the production is not greater. The reason is shading from overlapping leaves. The plants are usually placed in double rows 14 inches apart, with the plants within the row 16 inches apart. Extra space is allowed for harvesting walkways between the sets of double rows. The actual configuration can vary, as long as the resulting individual plant spacing is 5 sq.ft in winter.

    Bookmark   April 18, 2008 at 2:26PM
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Much grass. That is exactly what I need.

    Bookmark   April 18, 2008 at 3:56PM
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