Hardiness Zone Map/Frost Dates

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Frost

United States Zone Average Frost Dates

Zone 1 Average dates the last frost - 1 Jun / 30 Jun Average date of the first frost - 1 Jul to 31 Jul vulnerable to frost 365 days per year

Zone 2 Average dates the last frost - 1 May to 31 May Average dates first frost - 1 August to 31 August

Zone 3 Average dates the last frost - 1 May to 31 May Average dates first frost - 1 September to 30 September

Zone 4 Average dates the last frost - 1 May to 30 May Average dates the first frost - 1 September to 30 September

Zone 5 Average dates the last frost - 30 March to 30 April Average dates the first frost - 30 September to 30 October

Zone 6 Average dates the last frost - 30 Mach to 30 April Average dates the first frost - 30 September to 30 October

Zone 7 Average dates the last frost - 30 March to 30 April Average dates the first frost - 30 September to 30 October

Zone 8 Average dates the last frost - 28 February to 30 March Average dates the first frost - 30 October to 30 November

Zone 9 Average dates the last frost - 30 January to 28 February Average dates the last frost - 30 November to 30 December

Zone 10 Average dates the last frost - 30 January or before Average dates the first frost - 30 November to 30 December

Another Consideration - Heat. That's why you need to consider the Plant Heat Zone Map put out by the American Horticultural Society.