First Frost: A Gardener's Checklist for Putting the Garden to Bed
Quick answer: Before the first frost, harvest any remaining flowers and dried-flower candidates, bring tender container plants inside, drain hoses, and mulch tender bulbs — but leave sturdy perennial seed heads standing through winter for pollinators and structural interest.
The first frost date gets treated like a single line on a calendar, but it functions more like a countdown, and gardeners who get caught off guard by it every year are usually working from the wrong assumption — that there will be a clear warning. There rarely is. The Old Farmer's Almanac and most state extension offices publish average first-frost windows by zip code, and it's worth checking yours now rather than waiting for a frost advisory, because several of the most important pre-frost tasks take more than a single afternoon to do properly.
Harvest Before You Lose It
Frost is unsentimental about anything still in bloom. Herbs, dahlias, and any dried-flower candidates still standing in the garden — strawflower, statice, yarrow, lavender's late second flush — should be cut on a dry day before the first hard freeze, since a single cold night can blacken petals that were perfect the evening before. This is the actual deadline for a home flower-drying project, not a suggestion: once frost hits, whatever's left in the bed is done for the year. We hang our own late-season cuttings the same way we'd recommend you hang yours — tied in small bundles, upside down, somewhere dark and dry with decent airflow — and the English lavender bundles we sell for autumn decor are cut on exactly this kind of pre-frost schedule, at the point where color and oil content both peak.
Protect What's Tender, Leave What Isn't
Container plants and anything marginally hardy for your zone should come inside or under cover before the first frost, not after a scare. But resist the instinct to cut every perennial to the ground on the same weekend. Many gardeners now leave seed heads and hollow stems standing through winter deliberately — they shelter overwintering pollinators and beneficial insects, and structural plants like coneflower and ornamental grasses genuinely earn their keep as winter interest, catching frost and low light in a way a bare bed can't. Save the hard cutback for late winter, right before new growth starts, rather than doing it now out of habit.
The Last Small Jobs
Round out the checklist with the unglamorous tasks that are easy to forget once the weather turns: drain and store hoses before a freeze cracks them, bring terra cotta pots inside or turn them over so they don't hold water and split, and get a thick layer of mulch down over tender bulbs and perennial roots while the ground is still workable. None of this takes long individually, but done in the wrong order — mulching before you've harvested, say, or cutting everything back before you've decided what to leave for the birds — it turns into more work than it needed to be. Treat the first frost less as an ending and more as the one deadline in the gardening calendar that actually holds.
FAQ: Preparing Your Garden for First Frost
How do I find my first frost date?
The Old Farmer's Almanac and most state extension offices publish average first-frost windows by zip code — check yours ahead of time rather than waiting for a frost advisory.
What should I harvest before the first frost?
Herbs, dahlias, and dried-flower candidates like strawflower, statice, yarrow, and lavender's late flush, since a single cold night can ruin them.
Should I cut back all my perennials before winter?
No — leave seed heads and hollow stems standing, since they shelter overwintering pollinators and add winter interest; save the hard cutback for late winter.
What other tasks should I do before the first freeze?
Drain and store hoses, bring in or turn over terra cotta pots, and add a thick layer of mulch over tender bulbs and perennial roots.