I was aware of but didn't not pay much attention to the long-day and short-day preferences of certain vegetables. I knew that with onions, since I live in the south, I needed to grow the short-day variety. But that was it - until recently. In spring last year I had a lot of success with radishes and beets and so this past fall I seeded the ground again with radishes, beets and, for good measure, turnips. Only the turnips grew, excepting a couple of sorry looking beets. Got me wondering.
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