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Garlic

Crop profile

Garlic crop profile

A hardy, patient bulb crop, planted early and left to mature slowly until final curing.

Italiano

Starting method

Direct sowing

Direct soil

0 °C

Transplant soil

not available

Night minimum

-3 °C

Frost buffer

-45 days

Heat stop

30 °C

Harvest

210–270 days

Indoor lead

not available

Key temperatures

  1. 0
  2. 5
  3. 10
  4. 15
  5. 20
  6. 25
  7. 30
  8. 35
  9. 40 °C
  • Below 0 °CCold risk: slower growth or cold damage.
  • 0 °CMinimum threshold to start direct sowing: 0 °C.
  • 0–25 °CBest range for growth and production.
  • 25–30 °CPerformance drops and plants move into stress.
  • Above 30 °CPause transplants: heat stress risk.

Garlic cycle

  1. 1. Start

    Method:
    direct sowing

  2. 2. Direct sowing

    Soil: at least 0 °C
    Night minimum: at least -3 °C

  3. 3. Growth

    Ideal temperatures 0–25 °C
    Avoid peaks above 30 °C

  4. 4. Harvest

    First harvest around:
    210–270 days after sowing

How to start

  • Recommended method: direct sowing.
  • Prepare the bed when soil and nights are stable.
  • Sow when soil has reached at least 0 °C and nights stay above -3 °C.

Temperatures to respect

  • Direct-sowing soil: minimum 0 °C.
  • Night minimum: minimum -3 °C.
  • Heat stop: 30 °C.
  • Suggested frost buffer: -45 days.

Harvest timing

  • Cycle to first harvest: about 210–270 days.
  • Harvest gradually as produce reaches maturity.

Seasonal notes

  • Protect young plants from late frosts and thermal swings.
  • In summer, avoid water stress and heat peaks above 30 °C.
  • Steady growth improves development and harvest quality.

FAQ and sources

When should you plant garlic?

Plant garlic directly as individual cloves, often in autumn. It handles cold well: the crop parameters allow soil around 0 °C and nights down to about -3 °C, with a wide frost margin. Many varieties need a cold period to form better bulbs. Spring planting is possible, but it often gives smaller bulbs. Choose a dry day and a well-drained bed, because garlic suffers more from rot than from cold.

Can you plant supermarket garlic?

It is better to avoid it. Table garlic may have been treated to stop sprouting, may not suit your local climate, or may carry disease. Use certified seed garlic or cloves from a reliable supplier. Separate the cloves only when you are ready to plant, choose the largest and healthiest ones, and plant them point up. Small cloves often produce weak plants and small bulbs, so use them in the kitchen instead.

How many months does garlic take to harvest?

Garlic has a long cycle: about 210-270 days. Autumn-planted garlic is usually harvested from late spring to summer, when the leaves begin to yellow and dry. Do not wait until the whole plant is completely dry, because the bulb can split and store poorly. Lift it with a fork or spade instead of pulling only by the stem. Then dry the plants in an airy, shaded place before cleaning and storing the bulbs.

Why does garlic make small bulbs?

Small bulbs often come from small starting cloves, late planting, poor soil, too little light, or weed competition. Garlic grows slowly and does not cover the soil, so the bed must be kept clean. It needs full sun and well-drained soil, not excessive nitrogen. Lack of winter cold can also reduce clove division in some varieties. Water only during dry spells, especially in spring, then stop when the leaves start to dry.

Can garlic be grown in pots?

Yes. Garlic grows well in pots if the container is deep and drains properly. Use loose compost, space the cloves well, and keep the pot in full sun. The main issue is water: the mix must not stay wet in winter, but it should not dry out too much in spring while the bulbs swell. Pot-grown bulbs may be smaller than field-grown bulbs, but garlic is simple and works well on sunny balconies.

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