Bulb crop · reference page

Garlic

A long-cycle bulb crop whose planting material and cold response must suit the local region.

Scientific name: Allium sativum

Editorial guidance without independent agronomic review

Published: August 2, 2026 · Updated: August 2, 2026

Direct sun reference
6 h
Usable root depth
9.8 in (25 cm)
First-harvest band
180–260 days

Getting started

Sowing and space

Plant disease-free, locally appropriate cloves at the depth and orientation stated by the supplier.

Allow about 9.8 in (25 cm) of usable depth and roughly 4.7 in (12 cm) between plants.

Watering reference: low to moderate. Adjust to rain, heat, wind, growth stage and container volume.

Planting windows by broad profile

These original editorial windows compare thermal groups, not live weather. Check current frost, heat, rainfall and packet directions.

Very cold, short season

Use actual frost-free conditions, soil temperature, and short-season cultivars; a listed month alone is not enough.

AugSep

Winter survival and spring planting options require local Extension guidance.

Cold winter, warm summer

Local last and first frost, lake effects, elevation, and urban heat can move the usable window by weeks.

SepOct

Hot and humid

Favor cool crops outside peak heat and protect warm crops from the last local freeze rather than following the month alone.

OctNov

Mild marine

Watch soil warmth, drainage, direct sun, and local wind; inland valleys can differ markedly from the coast.

SepOctNov

Dry summer, mild winter

Use cool months for leafy crops and account for heat waves, wildfire smoke, irrigation rules, and local frost pockets.

OctNovDec

Arid or high desert

Treat windows as irrigated-garden references and verify elevation, frost, extreme heat, wind, and current water rules.

SepOctNov

Tropical or frost-light

Choose timing around local rainfall, disease pressure, storms, and heat; high-elevation tropical sites may belong elsewhere.

OctNov

Low-chill cultivars and local timing are essential; the general window may not apply at elevation.

Practical care

  • Keep the bed weeded during early growth.
  • Reduce watering as mature tops naturally dry, following local guidance.

Points to check

  • Grocery cloves may be unsuitable or carry disease.
  • Poor drainage can rot bulbs.

Provenance and confidence

This rule is an original editorial synthesis and no independent local agronomic review is claimed.

  • United States home food garden editorial synthesis — version 1

    Global Garden Planner

    Original seven-profile model and localized corpus. It remains an editorial draft until an independent U.S. agronomic review is recorded.

    Editorial role: internal synthesis · Rights position: Original project content · Accessed: August 2, 2026

    Open source

  • 2023 USDA Plant Hardiness Zone Map — map creation and interpretation

    United States Department of Agriculture, Agricultural Research Service

    Supports treating average annual extreme minimum temperature as one cold-risk reference, not a complete planting calendar or current forecast.

    Editorial role: fact reference · Rights position: Official public information; linked and paraphrased without redistributing the map or underlying datasets · Accessed: August 2, 2026

    Open source

  • U.S. Climate Normals

    NOAA National Centers for Environmental Information

    Supports the use of long-period climate context and the warning that station and regional conditions vary; it does not supply operational month rows.

    Editorial role: fact reference · Rights position: Official factual reference; no station dataset is redistributed · Accessed: August 2, 2026

    Open source

  • Vegetable Gardening

    USDA National Agricultural Library

    Supports the planning sequence of site selection, soil or mix preparation, planting, maintenance, and harvest, plus referral to Cooperative Extension.

    Editorial role: fact reference · Rights position: Official curated public guidance; linked and paraphrased · Accessed: August 2, 2026

    Open source

  • Seeds and Plants

    USDA National Agricultural Library

    Supports checking labeled seed from reputable sources and distinguishes planting material quality from a calendar recommendation.

    Editorial role: fact reference · Rights position: Official curated public guidance; linked and paraphrased · Accessed: August 2, 2026

    Open source

  • Non-compliant seeds: what you need to know

    USDA Animal and Plant Health Inspection Service

    Supports checking import and movement requirements and avoiding unidentified or non-compliant seed bought online.

    Editorial role: fact reference · Rights position: Official regulatory guidance; linked and paraphrased · Accessed: August 2, 2026

    Open source

Use it in context

A month alone cannot resolve cultivar, soil, microclimate or a current extreme.

Use reputable planting material. Use reputable domestic seed or plants and check current USDA APHIS and state restrictions before moving or importing plant material.

If a pesticide is considered, use only a product registered for the site and crop and follow the complete EPA-approved label and applicable state requirements.