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When to Plant Garlic (By Zone) and How to Grow It in a Raised Bed

Plant in fall, harvest next July: the easiest high-value crop for a raised bed.

Updated 2026-09-11

The rule

Plant garlic 2–4 weeks before the ground freezes: roots form, shoots do not. The practical trigger is soil temperature. When the soil 4 in down reads about 50°F, or the first fall frost has just passed, plant. Zones 3–5: late September to mid-October. Zones 6–7: October to early November. Zones 8–9: November to December (softneck types). Zone 10: refrigerate cloves 8 weeks first, plant in December.

Planting dates by zone

Too early (warm soil) and the cloves push up 6 in of leaf that winter burns back, which costs bulb size. Too late (ground frozen) and the cloves sit without roots and heave out in spring. If you miss the window, plant anyway as soon as the soil can be worked; late garlic makes smaller bulbs but still makes bulbs.

Hardneck or softneck?

Hardneck (Music, German Extra Hardy, Chesnok Red) for cold zones, bigger cloves, scapes in June, stores 4–6 months. Softneck (Inchelium Red, California Early) for mild zones, braids, stores 8–12 months. Zones 3–6 grow hardneck, zones 8–10 softneck, zone 7 both. Buy seed garlic, not supermarket bulbs (often treated to stop sprouting).

How much to buy

One pound of hardneck seed garlic is roughly 8–10 bulbs and 45–60 plantable cloves. At 4 cloves per square foot that fills about 12 sq ft. A 4×4 ft bed takes 1.5 lb; a 4×8 bed takes about 3 lb and yields 100 or more heads. Set aside the biggest 10–15 bulbs at harvest to replant and you never buy seed garlic again.

Planting in a raised bed

1. Loosen the top 6 in, mix in 2 in of compost and a handful of balanced organic fertilizer per square foot. Garlic hates wet feet, so a raised bed with the standard soil mix is close to ideal.
2. Break bulbs into cloves the day you plant. Biggest cloves = biggest bulbs. Leave the papery skin on each clove.
3. Plant pointed end up, 2 in deep, 6 in apart in a grid: 4 per square foot. In zones 3–4 plant 3 in deep for extra frost protection.
4. Mulch 3–4 in with straw or leaves. Water once.

Garlic shares a bed happily with the other October jobs in the fall vegetable garden: it can go in the strip a spent tomato plant just left.

Winter

Nothing to do. If cloves heave out after a freeze-thaw cycle, push them back in and add mulch.

Spring and summer

Pull mulch back a little when shoots appear. Feed once in March and once in April with a nitrogen-rich organic fertilizer (blood meal or fish emulsion). Stop feeding by mid-May: bulbs form around the longest days of June and late nitrogen makes leaves instead of bulb. Keep the bed evenly moist from April to early June, about 1 in a week; dry soil in May is the most common reason for small bulbs. Keep it weeded; garlic loses to anything that shades it.

Snap off scapes in June when they make one full curl (eat them). Removing scapes puts 20–30% more weight into the bulb. Stop watering when the bottom leaves brown, about two weeks before harvest.

Harvest and curing

Harvest when about half the leaves have died back, usually late June to July. Each green leaf is one intact wrapper layer around the bulb; wait until all leaves are brown and the wrappers split, and the bulb stores badly. Loosen with a fork and lift, never pull by the stem. Do not wash. Cure in a shaded, airy spot for 3 weeks, leaves on, then trim roots and stems to 1 in, brush off dirt and store cool, dry and dark. Hardneck keeps at 50–60°F for 4–6 months; a refrigerator makes it sprout.

Mistakes to skip

• Planting grocery-store garlic (treated, and often a softneck that fails in a cold zone).
• Planting in September in zone 6–7 because the packet arrived. Wait for cold soil.
• Skipping mulch in zones 3–5. Bare cloves heave out.
• Letting the bed dry out in May.
• Harvesting too late because the plant "looked fine".

FAQ

Can I plant garlic in spring?

Yes, but expect small bulbs or single rounds. Garlic needs 6–8 weeks of cold to split into cloves. Chill the seed garlic in the fridge for 6–8 weeks and plant as early as the soil can be worked, usually February to March.

Can I plant garlic from the grocery store?

Most supermarket garlic is a mild-climate softneck, often treated against sprouting. For $25 of seed garlic you get a variety suited to your zone and disease-free cloves.

My garlic sprouted in fall. Is it ruined?

No. A few inches of green in November is normal, especially in zones 6–8. Cold burns the tips back and the plant regrows from the clove in spring. Only deep-frozen, unmulched cloves in zones 3–5 are at risk.

How much garlic should I plant for a family?

About 50 heads a year covers a household that cooks with garlic most days. That is a 4×4 ft bed with room to spare, or 1.5 lb of seed garlic.

Why are my bulbs small?

The usual causes, in order: small cloves planted, planted too late, shaded by weeds or taller crops, dry soil in May, or feeding nitrogen after mid-May. Scapes left on the plant also cost size.

What I'd buy first

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