When to Plant Garlic: Fall Planting Dates by USDA Zone

Garlic is the one crop most gardeners plant when everything else is winding down. Cloves planted in autumn grow roots, sit through winter, then shoot up in spring and are ready to harvest the following summer. Plant too early and the cloves send up tall green tops that freeze; plant too late and roots have no time to anchor before winter.

Dates depend on where you live. Use the table below for a first estimate, look up your average first frost date by ZIP code, or get your exact planting dates in the planting calendar.

When is the best time to plant garlic?

Garlic needs a stretch of cold weather (vernalization) to form a bulb with multiple cloves. Fall planting provides it. The goal is for cloves to grow roots in cool soil without growing much above ground. Extension services in cold states such as Cornell and Minnesota advise planting 4–6 weeks before the ground freezes, which in most of the North is late September through October.

A practical trigger is soil temperature: plant when the soil at 4 inches has cooled below about 60°F and is trending down. Garlic is very frost-tolerant. A few inches of green growth before winter will usually survive, and roots keep growing in soil above freezing.

What are the garlic planting dates by USDA zone?

These windows are computed from typical average first fall frost dates for each zone, then offset from that date. They are estimates for a representative location; real first-frost dates vary by elevation and microclimate.

The dates are for planting, not harvest. If your frost date is earlier or later than the typical, shift the window by the same number of days.

Can you plant garlic in warm climates?

Yes, but there is a catch. In zones 9–10, winters may be too mild to vernalize cloves, and bulbs may form without distinct cloves. The fix is to pre-chill seed garlic in the refrigerator for 4–8 weeks (keep it away from ripening fruit), then plant in late fall or winter. Choose softneck varieties adapted to the South, which need less cold than hardneck.

Should you plant hardneck or softneck garlic?

How do you plant garlic step by step?

1. Buy seed garlic. Use bulbs from a nursery or garlic grower, not supermarket garlic, which may be treated to prevent sprouting or be a variety unsuited to your climate.
2. Prepare the bed. Choose a sunny spot with loose, well-drained soil. Work in 2–3 inches of compost. Garlic rots in soggy ground.
3. Break the bulbs into cloves 1–2 days before planting, keeping the papery skin on each clove. Plant the largest cloves.
4. Plant pointed end up, 2 inches deep (3 inches in cold zones 3–5), 6 inches apart, in rows 12 inches apart.
5. Cover with soil and water well to settle it.
6. Mulch. Add 4–6 inches of straw or shredded leaves after the soil cools, or immediately in zones 3–5.

A 4 × 8 ft raised bed planted on a 6-inch grid holds 8 × 16 = 128 cloves.

How long does garlic take to grow?

Expect about 8–9 months from planting to harvest. Shoots appear in late fall or early spring. Hardneck garlic sends up a curling scape in late spring to early summer; snip it so the plant puts energy into the bulb. Harvest when the lower third to half of the leaves have turned brown, typically between June and August depending on zone and variety. Cure the bulbs in a shady, airy place for 2–4 weeks.

What are common garlic planting mistakes?

1. Planting too early. Warm fall soil makes tall tops that may be damaged by hard freezes.
2. Planting too late. Cloves without roots can heave out of the soil in a freeze-thaw cycle.
3. Planting upside down. The pointed end must face up, or shoots waste energy turning around.
4. Skipping mulch in zones 3–6, where winter freeze-thaw can push cloves up.
5. Replanting garlic in the same bed every year, which builds disease pressure. Rotate with a 3–4 year gap from other alliums.
6. Over-fertilizing with nitrogen in spring after mid-season, which delays bulbing. Feed early, then stop around scape time.

What soil and care does garlic need through the season?

Garlic prefers fertile, loose, well-drained soil with a pH of about 6.0 to 7.0. A soil test tells you whether to add lime or sulfur. Work in compost before planting rather than fresh manure, which can burn cloves and introduce weeds.

• Fall: plant and mulch; no further fertilizer needed.
• Early spring: when shoots are 4–6 inches, pull back mulch if it is thick and apply a nitrogen feeding (blood meal or a balanced fertilizer at the label rate).
• Spring to early summer: give about 1 inch of water per week if rain is short, and keep beds weeded because garlic competes poorly.
• 2–3 weeks before harvest: stop watering so bulb wrappers dry and cure well.

How much seed garlic should you buy?

A 4 × 8 ft raised bed on a 6-inch grid holds 128 cloves. Hardneck bulbs average roughly 6 usable cloves, so you need about 21 bulbs. Softneck bulbs have around 12 or more cloves, so about 11 bulbs fill the same bed. Buy a few extras because small inner cloves are better eaten than planted. Larger cloves produce larger bulbs the following summer.

Frequently asked questions

The bottom line

Plant garlic in fall, from about your first frost date to four weeks later, and a few weeks before the ground freezes. Zones 3–5 plant from mid-September to October, zones 6–7 from late October to November, and zones 8–10 from November into January with pre-chilled cloves. Put cloves 2 inches deep and 6 inches apart, then mulch. Find your date for your ZIP code in the planting calendar. For everything after planting, from feeding to curing, see our full guide on how to grow garlic.

Related tools: Plant Spacing Calculator · Soil Calculator · Mulch Calculator