The county extension service advises to plant 2 weeks after the average frost-free date. Sadly, that would put me into June here at 6700 feet. I have had good luck for the last four years using a cold frame and Wall O’Waters. Last year, the tomato plants in the Wallo’Waters totally outpaced/outgrew the cold frame tomatoes. These act like a personal greenhouse for each tomato. My tomatoes grew strong, quickly, and well. They produced really well, too.
This year I am hedging my bets. I am planting equal numbers of plants outside in the garden (in well-amended soil) and in the greenhouse with the most recommended recipe on the web, 1/4 compost, 1/4 potting soil, 1/4 peat, and 1/4 vermiculite. These plants will all go out this weekend, May 14ish. The outside plants will be protected by their Wall o’Waters, and the greenhouse ones will get be 100 degrees by day, and I will turn on a Mr.Buddy propane heater at night only if temps drop below freezing. We’ll see.
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