How to grow garlic
Family Amaryllidaceae. Hardy to USDA hardiness zone 3a+ (U.S. Department of Agriculture). Full sun. Ready in 240 days.
Sun
Full sun
Spacing
4-6 in
Days to harvest
240 days
Hardiness
Zone 3a+
What growers actually recorded
Loading zone 7b results…
When to plant garlic
Companion plants for garlic
Plant with: Tomato, Cabbage, Beet.
Avoid near: Bean, Pea.
Common pests & problems
Few: a garden protector.
Feeding & fertilizer
N-P-K ratio: Moderate N + high P (5-10-10)
Organic options: Compost + bone meal at planting · Fish emulsion monthly through spring · Stop feeding as bulbs swell
When to feed: Feed through spring leaf growth, then stop once tops start to yellow so bulbs cure hard.
Watch for: Thick, soft necks = too much late nitrogen; bulbs won't store.
N = nitrogen (leaves), P = phosphorus (roots and flowers), K = potassium (fruit and disease resistance). How to read a fertilizer label →
Grower's tip
Plant cloves 4-6 weeks before first fall frost. Mulch heavily and forget until June.
When to plant garlic in your zone
Free month-by-month sowing and transplanting lists, built from frost dates for your USDA (United States Department of Agriculture) hardiness zone.
Soil & water for garlic
Soil & pH
6.0-7.0
Loose, well-drained loam.
Compost + bone meal. Cut nitrogen once bulbing begins.
Watering
1 in / week during bulbing; taper before harvest
Drip; keep foliage dry to prevent purple blotch.
Falling, yellowing tops = pull water and cure.
Knowing when to harvest
- Bottom 3-4 leaves brown, upper leaves still green, usually late June (hardneck) or July.
- Loosen with a fork; never pull by the tops (bruises the wrapper).
- Cure hanging in a shaded, airy spot for 2-3 weeks.
Storing & keeping
Cured bulbs at 55-65°F, 60-70% humidity, dark, airy. 6-9 months for hardneck; up to a year for softneck. Never refrigerate whole bulbs (triggers sprouting).
What to expect
Per plant: One bulb per clove planted; 1:6-1:10 return on seed
10 lb seed = 60-100 lb harvest in good soil.
Troubleshooting garlic
Small bulbs / no division
Likely cause: Planted too late, too shallow, or too much nitrogen late in the season
What to do: Plant 4-6 weeks before hard frost, 2 in deep, stop feeding once scapes appear.
Rust (orange leaf spots)
Likely cause: Wet foliage in humid weather
What to do: Remove worst leaves, harvest early if it spreads; bulbs are still edible.
Varieties worth growing
Music (porcelain hardneck)
Large cloves, easy peel, cold-hardy: best for northern gardens.
German Extra Hardy
Cold-hardy, stores 8+ months.
California Early (softneck)
For zone 7+; long-storing, braidable.
Growing garlic in containers
12 in deep pot; plant cloves 4 in apart. Mulch heavy in cold zones.
Nutrition
Allicin, quercetin, prebiotic fiber.
Common questions
Can I plant garlic in spring?
You'll get a plant but tiny bulbs. Fall planting is essentially non-negotiable in zones 3-7.
Should I cut off scapes?
Yes on hardneck. Bulb size increases 25%. Eat the scapes; they're delicious.
Where these numbers come from
- USDA Plant Hardiness Zone Map (2023 revision). Zone assignment and the 30-year normals behind every cold-hardiness figure.
- NOAA NCEI 1991-2020 Climate Normals. Frost dates, growing-season length, and the probability bands on both.
- Cornell, UMN, and UC Davis Cooperative Extension crop guides. Spacing, days to maturity, soil pH targets, and per-plant yield ranges.
- USDA FSIS / FDA Produce Safety guidance. Wash, cure, and cold-storage handling numbers.
Ranges are regional guidance, not a promise for your yard. Your own logged results always override the published range.