Garlic: when to plant, how deep and how far apart

On this page: Garlic planting chart · Hardneck or softneck · Depth and spacing · Garlic in containers · Spring care and scapes · Harvest, curing and storage · Checklist

Garlic planting chart: when to plant by region

Every source opened here plants garlic in fall. The aim, in New Hampshire's words, is to plant early enough for roots to form but not so late that shoots grow before winter; Minnesota notes that roots and shoots emerge by the first hard freeze, though shoots usually stay below ground until spring. Spring planting is "not recommended" in Virginia and Georgia, gives poor bulbs and low yields in Utah, and is a less reliable fallback (March–April) in New Hampshire. Start from your own average frost dates and hardiness zone, then read the closest row.

Georgia adds why fall matters in warm areas: cloves need 6–8 weeks below 40°F after planting for vernalization. In the South, garlic is one of the frost-tolerant crops in Texas A&M's fall guide, so it can stay in the ground through cold weather. More fall dates by zone are on the zone 7, zone 8 and zone 9 pages.

Hardneck or softneck

UMN groups Rocambole, Purple Stripe and Porcelain as hardnecks and Artichoke and Silverskin as softnecks. Elephant garlic is not a true garlic (WSU) and is closer to leek (UMN, USU). Buy seed garlic from a garlic seed producer, local farmer or catalog rather than the grocery store: supermarket garlic is usually softneck and may not suit a cold climate (UMN, UNH), may carry disease without symptoms (UMD), or may be treated to stop sprouting (UC Sacramento).

Planting depth and spacing

1. Break the bulb into cloves just before planting: a day or two ahead (UMN) or the same day (WSU, UC Sacramento).
2. Plant the largest firm, unblemished cloves; discard any with mold or damage (UNH, UC Sacramento). Each clove grows one bulb, which should carry 10–15 cloves (USU).
3. Set each clove flat end down, pointed end up, then cover and mulch.

Close spacing suits a small bed, with a limit: USU warns that dense planting shrinks bulbs unless water and nutrients are adequate. Grid layouts for other crops are on square foot gardening spacing.

Garlic in containers

Garlic grows in a pot on a patio or balcony. UC Master Gardeners of Sacramento suggest containers or barrels where garden space is limited, and an Ask Extension answer for an apartment patio near Seattle (October 2025) gives the clearest container method:

• Pot. At least 8–12 in deep with drainage holes; a wider pot holds more cloves. Raise it on feet or bricks so it does not waterlog.
• Mix. A loose, well-draining potting mix rich in organic matter, not heavy garden soil.
• Planting. Seed garlic, hardneck for cold tolerance and scapes; cloves 2–3 in deep, pointed side up, 4–6 in apart; plant in late October to early November in western Washington.
• Winter. 1–2 in of straw or leaf mulch; water less in winter, keep the mix evenly moist but not soggy, and resume regular watering in spring.
• Sun. 6 or more hours a day. UC Sacramento also asks for about 6 hours of sun through the winter months.

For green garlic, NC State's container table lists a 2-quart minimum, 4–6 in deep, plants 4 in apart. Other crops are compared on container sizes for vegetables, and fabric pots on grow bags. Pots dry faster than beds; see watering containers.

Spring care and scapes

• Mulch. Check that shoots can push through it and loosen it where needed (UNH). Minnesota removes it after the threat of hard freezes passes or leaves it for weeds and moisture; Maryland reports that some gardeners find unmulched plants regrow faster in spring.
• Water. About 1 in a week in the growing season (UMN, WSU). Stop 2 weeks before harvest (UMN), 2–4 weeks before (WSU), or when leaves begin to yellow (USU).
• Feeding. Garlic needs moderate to high nitrogen: Minnesota side-dresses when shoots emerge and again 2–3 weeks later, and avoids nitrogen after the first week of May, which can delay bulbing. Sacramento stops fertilizing 6–7 weeks before harvest. Rates depend on a soil test; this page gives none.
• Weeds. Young plants compete poorly, so weed early and carefully (UMN, UC Sacramento).
• Scapes. Hardnecks send up scapes around June (UNH). Cut them when they begin to curl so the bulb grows larger (UMN, UNH, WSU); they are edible, and Maryland uses them in place of scallions.

Harvest, curing and storage

Loosen bulbs with a fork rather than pulling them (UNH, UC Sacramento), and handle them gently: bruises raise disease and storage losses (WSU). After curing, trim tops to about 1 in and trim the roots (UNH, WSU), and save the largest bulbs for next fall's planting (UMN, USU).

Pests and diseases include onion maggot, aster yellows, bulb mites (UMN), rust, white rot, basal rot and neck rot (WSU). Rotate alliums: WSU uses a three-year cycle and does not follow garlic with onions; Minnesota rotates every four years. Ask your county extension office to confirm a diagnosis.

Small-space checklist

• Order seed garlic, not grocery garlic; softneck in the South, hardneck in cold winters.
• Plant in fall on the date in the chart above for your region.
• Cloves pointed end up, about 2–3 in deep, 4–6 in apart.
• Mulch 3–4 in in beds, 1–2 in in pots at least 8–12 in deep.
• Water about 1 in a week in spring; stop 2–4 weeks before harvest.
• Cut scapes when they curl; dig when the lower leaves brown, then cure 1–4 weeks.

Other cool-season crops for the same beds: spinach, kale and radishes; covers that carry crops through winter are on season extension.