edible gardening
When to plant garlic — fall planting calendar US + UK
Plant garlic in fall, 4-6 weeks before first hard frost, harvest next summer. Mid-Sept zone 3-4, mid-Oct zone 5-7, Nov zone 8-9, October in UK.
When to plant garlic — fall planting calendar US + UK
Garlic is the upside-down crop in the vegetable garden. While almost everything else goes in the ground in spring for a same-year harvest, garlic is planted in autumn, sleeps through winter, and is harvested 9-10 months later in mid-summer. Get the timing right and a single clove turns into a full head of 6-12 cloves. Get it wrong and you end up with marbles. This guide is the zone-by-zone fall calendar; once the cloves are in, our full guide on how to grow garlic covers the hardneck vs softneck call, scapes, harvest and curing, and the spring-planting backup plan. For most growers garlic is the headline job of the month — see the wider October garden tasks (US) or the October garden tasks (UK) for everything else that needs doing while the soil is still workable.
Personal reminder: Add your zip code or UK postcode to Growli and I'll ping you in your specific planting week — tied to your local first-frost forecast, not a generic chart date.
Why fall planting beats spring
Garlic is biennial in behaviour. It needs a cold period (vernalization) of 6-8 weeks under 4°C (40°F) to trigger bulb formation. If you skip the cold period — by planting in late spring — the plant grows leaves but never differentiates into separate cloves. You harvest a single round bulb instead of a segmented head.
Equally important: bulb size is set by root mass going into winter. Cloves planted 4-6 weeks before the first hard frost develop a strong root system in cool soil while above-ground growth stays minimal. Those roots resume in early spring and fuel the leaf burst that determines how big the eventual bulb gets. Plant too late and the roots never establish; plant too early and the top growth emerges, gets killed back by frost, and the plant wastes energy regrowing.
The window is forgiving — anywhere from 4 to 6 weeks before your first hard frost works. Aim for the middle of that range.
US timing by USDA hardiness zone
Find your zone with our USDA hardiness zone map explainer or the hardiness zone lookup tool, then match it to the planting window below.
| Zone | First hard frost (avg) | Plant cloves | Mulch by |
|---|---|---|---|
| Zone 3 | Mid- to late October | Mid-September | Late October |
| Zone 4 | Late October | Mid- to late September | Early November |
| Zone 5 | Early November | Late September to early October | Mid-November |
| Zone 6 | Mid-November | Mid-October | Late November |
| Zone 7 | Late November | Late October to early November | Early December |
| Zone 8 | Mid-December | Early to mid-November | Mid-December |
| Zone 9 | Late December or none | Mid- to late November | Optional |
| Zone 10-11 | Frost-free | December-January (pre-chilled cloves) | Not needed |
State-specific anchors: in Michigan (mostly zones 5-6), plant late September through mid-October. In Pennsylvania (zones 5-7), early October to early November works across the state. In Ohio (zones 5-6), aim for the first three weeks of October. In Missouri (zones 5-7), mid-October to early November. In Georgia (zones 7-8), late October into mid-November. In Texas, the window splits — Panhandle (zone 7) in late October, central and east Texas (zones 8-9) in November, south Texas (zone 9-10) into early December with pre-chilled cloves.
UK regional timing
The UK doesn't use USDA zones — see our UK RHS hardiness ratings primer for the H1-H7 system. For garlic, the practical rule across the country is straightforward.
| UK region | Plant cloves | Notes |
|---|---|---|
| Channel Islands, south Cornwall | Mid- to late October | Mild winters; some growers plant November |
| Southern England (London, Bristol, Brighton) | Mid-October | The default UK window |
| Midlands + Wales | Early to mid-October | Cooler soils — plant a week earlier |
| Northern England (Manchester, Leeds, York) | Late September to early October | Get cloves in before soil cools under 7°C |
| Scotland (lowland) | Late September | Short window; consider spring planting too |
| Scotland (highland), Northern Ireland | Late September or spring | Heavy clay soils benefit from spring planting |
A second UK window opens in late February to early March for spring garlic varieties (specifically bred for spring planting — not the same as fall varieties pushed late).
Hardneck vs softneck — which to choose
Garlic splits into two subspecies, and the choice changes both your planting window and your harvest.
Hardneck garlic (Allium sativum var. ophioscorodon) — Rocambole, Porcelain, Purple Stripe groups
- Best in US zones 3-7 and most of the UK
- Needs a real cold winter to bulb properly
- Produces scapes (curly flower stalks) in early summer — snap them off and eat them sautéed
- Larger, easier-to-peel cloves (typically 4-8 per bulb)
- Stores 4-6 months
- Stronger, more complex flavour
- Popular varieties: Music, German Extra Hardy, Chesnok Red, Spanish Roja
Softneck garlic (Allium sativum var. sativum) — Artichoke, Silverskin groups
- Best in US zones 7-11 and southern UK (mild winters)
- Tolerates milder winters but also handles cold to about zone 5 with mulch
- No scapes
- More cloves per bulb (10-20), smaller individual cloves
- Stores 8-12 months — this is the grocery-store garlic
- Milder flavour
- Braid-able necks (the strings of garlic in farmers' market stalls)
- Popular varieties: Inchelium Red, California Early, Silver White, Lorz Italian
If you're in zones 3-6 or anywhere in Scotland or northern England, plant hardneck. If you're in zones 8-10 or south coastal UK, plant softneck. In the overlap zone (5-7 / Midlands and southern England), plant both — you get the flavour of hardneck and the storage life of softneck.
Spring planting — when it works and what to expect
Spring garlic planting is a legitimate fallback, not a failure mode. Use it if:
- You missed the fall window (life got busy, ground froze early)
- You live somewhere with brutal winters that may kill fall plantings (some highland sites)
- You're growing softneck in zones 3-4 where fall-planted softneck struggles
The spring rule: plant as soon as the ground is workable — late February in zone 8, March in zones 5-7, early April in zones 3-4 and Scotland. Use pre-chilled cloves: refrigerate them at 4°C (40°F) for 6-8 weeks before planting to simulate the missed winter cold.
Expect smaller bulbs. Spring-planted garlic typically produces bulbs 30-50% smaller than fall-planted. Cloves may not fully differentiate, so some heads come out as single rounds — still useful in cooking, just not as pretty. Harvest happens around the same time (late July to August) but the leaf growth is compressed into fewer weeks.
The planting process — step by step
- Source seed garlic from a nursery or seed company. Don't plant supermarket garlic — most is treated with sprout inhibitors and bred for storage, not for your climate.
- Break the bulbs into individual cloves the day of planting (any earlier and they dry out). Keep the papery wrapper on each clove.
- Sort cloves by size. Plant only the largest cloves — they produce the biggest bulbs. Cook the small inner cloves.
- Prepare the bed with well-rotted compost worked into the top 8 inches. Garlic wants loose, free-draining soil. Heavy clay needs amending with grit or raised beds — and our vegetable garden layout guide covers where garlic fits in the wider rotation.
- Plant cloves pointed-end up, 2 inches deep in mild zones, 4 inches deep in cold zones (3-5). Space 6 inches apart in rows 10-12 inches apart.
- Water in if the soil is dry.
- Mulch with 3-4 inches of straw, shredded leaves, or grass clippings after the first hard frost. The mulch insulates the soil through freeze-thaw cycles. In zones 8-10 a thin mulch is optional.
- Walk away until spring. Don't water through winter (rainfall is enough). Don't worry if green shoots appear before snow — they're hardy.
Harvest timing — next summer
Garlic planted in October is harvested late June through July in most regions:
| Region | Harvest window |
|---|---|
| US zones 3-5 | Mid-July to early August |
| US zones 6-7 | Late June to mid-July |
| US zones 8-9 | Mid-June to early July |
| UK (most of country) | Late June to mid-July |
| UK Scotland + northern England | Mid- to late July |
The signal: harvest when the bottom 3-4 leaves have yellowed and dried but the top 5-6 leaves are still green. Each green leaf equals one wrapper layer on the bulb — if you wait until all leaves are brown, the wrappers split and the bulb won't store. If you harvest too early, the cloves haven't filled out.
Hardneck growers get a mid-season bonus: scapes appear in early June (about 3-4 weeks before bulb harvest). Snap them off when they curl once — this redirects energy to the bulb and gives you a delicious side ingredient. Don't let scapes flower; that costs you bulb size.
Related articles
- How to grow tomatoes — full growing guide for the other summer staple
- When to plant tomatoes — spring planting companion to this fall calendar
- How to start a vegetable garden — beginner overview with garlic in the rotation
- How to grow basil — pairs with garlic in the kitchen and the bed
- USDA hardiness zones explained — full zone library
- Find your zone by ZIP or postcode — pinpoint your first-frost date for garlic timing
- Month-by-month planting calendar — see what to plant in October, November, and beyond
Reviewed and updated by the Growli editorial team. For questions about anything here, open Growli and ask — or email hello@getgrowli.app.
Frequently asked questions
When to plant garlic?
Plant garlic in fall, 4-6 weeks before your first hard frost, for harvest the following summer. That's mid-September in US zones 3-4, late September to mid-October in zones 5-7, late October to November in zones 8-9, and around mid-October across most of the UK. Cloves need 4-6 weeks to establish roots before winter dormancy — that root mass determines next summer's bulb size.
When is the best time to plant garlic?
The best time is 4-6 weeks before your first hard frost, when soil is still workable but cooling below 15°C (60°F). For most US gardeners that's October; for UK gardeners it's mid-October. Plant too early and the green tops emerge and get frost-damaged; plant too late and roots don't establish before the ground freezes, producing small bulbs next year.
How and when to plant garlic?
Plant in fall, 4-6 weeks before first hard frost. Break bulbs into cloves on planting day (keeping papery wrappers on). Plant the largest cloves pointed-end up, 2 inches deep in mild zones or 4 inches in cold zones, spaced 6 inches apart. Mulch with 3-4 inches of straw after the first hard frost. Don't water through winter. Harvest the following June or July.
When to plant garlic bulbs?
Plant garlic bulbs — broken into individual cloves — in fall, 4-6 weeks before your first expected hard frost. Don't plant whole bulbs; separate them into cloves the day of planting so they don't dry out. Each clove produces one new bulb of 6-12 cloves the following summer. Use only seed garlic from a nursery, not supermarket bulbs (often treated with sprout inhibitors).
When to plant garlic in Ohio?
Ohio spans US zones 5b-6b. Plant garlic in the first three weeks of October across most of the state — early October in northern Ohio (Cleveland, Toledo) and mid- to late October in southern Ohio (Cincinnati, Columbus suburbs). Mulch heavily with straw after Halloween. Hardneck varieties like Music and German Extra Hardy do best in Ohio's winters.
When to plant garlic in Michigan?
Michigan is mostly zones 5-6, with the Upper Peninsula in zones 3-4. Plant late September through mid-October across the Lower Peninsula; plant mid- to late September in the UP. Mulch with 4-6 inches of straw to protect against freeze-thaw cycles around Lake Michigan. Hardneck varieties are the right call across the state.
When to plant garlic in PA?
Pennsylvania spans zones 5b-7a. In western PA and the Allegheny highlands plant early to mid-October; in central PA mid- to late October; in southeastern PA (Philadelphia area) late October to early November. Aim for soil temperatures around 10°C (50°F) at planting depth. Hardneck varieties suit most of Pennsylvania.
When to plant garlic in Texas?
Texas covers zones 7-10, so timing varies. Panhandle and north Texas (zone 7): plant late October. Central and east Texas (zones 8-9): plant in November. South Texas (zones 9-10): plant in late November or early December using pre-chilled cloves (refrigerate 6-8 weeks before planting). Softneck varieties like Inchelium Red and California Early do best in Texas heat.
When to harvest garlic planted in fall?
Garlic planted in fall is harvested the following summer, typically late June through July depending on region. The signal: the bottom 3-4 leaves have yellowed and dried, but the top 5-6 leaves are still green. Each green leaf equals one wrapper layer on the bulb. US zones 6-7 harvest late June; zones 8-9 mid-June; zones 3-5 and UK mid- to late July.
When to harvest garlic planted in October?
Garlic planted in October is ready 9 months later — late June to mid-July in most US zones 5-7 and across the UK. In warmer zones 8-9, October-planted garlic finishes earlier (mid-June). Watch for the bottom 3-4 leaves to brown while top leaves stay green — that's the harvest window. Dig (don't pull) the bulbs with a fork to avoid bruising the wrappers.
How does Growli know when to plant garlic in my location?
Add your zip code (US) or postcode (UK) to Growli and I'll tie the garlic planting reminder to your specific first-hard-frost forecast from NOAA / Met Office data — counting back 4-6 weeks. I'll also remind you to source seed garlic in August, mulch after the first frost, snap scapes in June (if you're growing hardneck), and harvest when the leaf signals appear next summer.