Frost Zones

Everyone is itching to start seeds by now. I see a lot of questions about it out there. Me personally, since I haven't ordered a seed starting tray am not too worried. That and I'm waiting for the local garden columnist tells me it's time.

But I did find a good chart on the web, out of curiosity.

The average dates taken from that webpage for first and last frost are:

Zone 1 = Average dates Last Frost = 1 Jun / 30 Jun
Average dates First Frost = 1 Jul / 31 Jul
Note: vulnerable to frost 365 days per year

Zone 2 = Average dates Last Frost = 1 May / 31 May
Average dates First Frost = 1 Aug / 31 Aug

Zone 3 = Average dates Last Frost = 1 May / 31 May
Average dates First Frost = 1 Sep / 30 Sep

Zone 4 = Average dates Last Frost = 1 May / 30 May
Average dates First Frost = 1 Sep / 30 Sep

Zone 5 = Average dates Last Frost = 30 Mar / 30 Apr
Average dates First Frost = 30 Sep / 30 Oct

Zone 6 = Average dates Last Frost = 30 Mar / 30 Apr
Average dates First Frost = 30 Sep / 30 Oct

Zone 7 = Average dates Last Frost = 30 Mar / 30 Apr
Average dates First Frost = 30 Sep / 30 Oct

Zone 8 = Average dates Last Frost = 28 Feb / 30 Mar
Average dates First Frost = 30 Oct / 30 Nov

Zone 9 = Average dates Last Frost = 30 Jan / 28 Feb
Average dates First Frost = 30 Nov / 30 Dec

Zone 10 = Average dates Last Frost = 30 Jan or before
Average dates First Frost = 30 Nov / 30 Dec

Zone 11 = Free of Frost throughout the year.


Now, the span of dates is because the zones are big and there is variety. But it is a good approximation. Not that this (or any) winter is predictable.