The Q&A Archives: When can we determine our LAST frost date??

Question: I'm going nuts here in the Santa Cruz Mountains. I need to get my tomato plants, but the fluctuations of temps are so unpredictable! Normally it's May 1, but this year I'm having trouble. When can I be sure that it will be warm enough for my tomatoes?

Answer: According to the National Weather Service May 15 is your official average last frost date but that can vary, as you know. I'd plant the tomatoes out after May 15 but be prepared to cover them if another frost is predicted.

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