Plants by Zone

Zone 1 · Zone 1

First frost countdown

Around ~Aug 5

Zone 1's average first fall frost lands around ~Aug 5. That is a long-run average — a hard night can arrive a week or two early, so once you are inside three weeks, start watching the local forecast rather than the calendar.

Harvest these before the frost

These crops are still being picked in August in Zone 1, and a hard freeze ends them. Bring in what is ready and cover anything you want to push another week or two.

Leave these — frost makes them sweeter

Cold converts stored starch into sugar, so these improve after a freeze rather than suffering from one. Pulling them early is the mistake.

  • CabbageLeave it

    Harvested August

  • KaleLeave it

    Harvested July

Common questions

When is the first frost in Zone 1?
Zone 1's average first fall frost falls around ~Aug 5. It is an average, not a guarantee — a cold snap can arrive one to two weeks early, so treat the countdown as a planning tool and watch your local forecast once you are inside three weeks.
Which vegetables actually taste better after a frost?
In Zone 1: Cabbage, Kale. Cold converts stored starches into sugars, so these get sweeter rather than being damaged. Leave them in the ground and pick as needed.

Other zones: Zone 1 · Zone 2 · Zone 3 · Zone 4 · Zone 5 · Zone 6 · Zone 7 · Zone 8 · Zone 9 · Zone 10 · Zone 11 · Zone 12 · Zone 13