Garlic
Allium sativum
Planted in autumn, ignored all winter, harvested in July. The least demanding crop in the garden.

Plant in autumn
Garlic roots before winter then sits through the cold. Plant four to six weeks before the ground freezes - late October into November here. Spring-planted garlic produces a small bulb or a single undivided round, because hardnecks need sustained cold (vernalisation) to split into cloves.
Hardneck versus softneck
Hardneck suits our winters, tastes better, gives four to eight large easy-peel cloves and produces scapes. Softneck stores roughly twice as long and braids, but has many small fiddly cloves and prefers a milder winter. In zone 6b/7 plant hardneck as the main crop and softneck only if long storage matters more than flavour.
Break the bulb late
Separate bulbs into cloves within a day or two of planting, not weeks ahead - exposed cloves dry out. Plant only the largest cloves, pointed end up, two inches deep. Small inner cloves make small bulbs; cook with those instead.
Mulch heavily
Four to six inches of straw after planting moderates the freeze-thaw cycles that heave cloves out of the ground, and suppresses the spring weeds garlic competes badly against. Pull it back a little in spring if the soil is slow to warm.
Cut the scapes
Hardnecks send up a curling flower stalk in June. Cut it once it makes a full loop - it measurably increases bulb size, and the scapes are excellent grilled or in pesto. They are the first real harvest of the year.
Feeding and water
Side-dress with nitrogen in early spring as growth resumes, then again a month later. Stop watering two to three weeks before harvest; wet soil at the end stains wrappers and invites rot.
Problems
White rot is the serious one - a fluffy white fungus at the base with tiny black specks that persists in soil for decades; never plant garlic in that ground again. Rust shows as orange pustules on leaves in humid weather and mostly costs you size. Nematodes and mites travel on seed garlic, so buy clean stock rather than planting supermarket bulbs.
Knowing when to lift
Harvest when the lower three or four leaves have browned but five or six remain green. Each green leaf corresponds to an intact papery wrapper. Wait too long and the wrappers rot away, the bulb splits, and it will not store. Loosen with a fork rather than pulling by the stem.
Curing and storage
Cure whole plants with tops attached, hanging or on racks somewhere dry and airy out of sun, for three to four weeks. Then trim roots and cut stems to an inch, or braid softnecks. Store at room temperature, dry and dark - never refrigerate, which triggers sprouting. Save your biggest bulbs to replant.
- Plant
- Oct-Nov
- Harvest
- Jul
- Type for 6b/7
- Hardneck
- Spacing
- 6 in
- Row spacing
- 12 in
- Depth
- 2 in, tip up
- pH
- 6.0-7.0
- Storage
- 4-6 months (hardneck)