How to Grow Garlic in Pots Step by Step

Garlic is one of the simplest, most satisfying crops for the balcony: you plant a clove and, several months later, you harvest a whole head. It needs little maintenance, has almost no pests and takes up little space. The only requirement is patience, because it's a long-cycle crop.

When to plant

Garlic needs a spell of cold to form a good head:

• Autumn (October-November): the ideal time in most climates. Roots develop over winter and the head forms in spring.
• Late winter: possible in very cold climates, though the heads usually come out smaller.

Which garlic to plant

• Use seed garlic or, failing that, good-quality organic garlic (supermarket bulbs are sometimes treated not to sprout).
• Choose the biggest, healthiest cloves from the head: a bigger clove means a bigger head.
• Separate them just before planting and don't peel them.

Hardneck or softneck garlic

Garlic falls into two big groups, and choosing well makes growing easier:

• Hardneck: produces a central flower stalk (the scape), fewer but larger cloves and a stronger flavor. It handles cold better, so it's the best pick for harsh winters.
• Softneck: usually doesn't send up a scape, gives more cloves per head and stores longer. It's the classic braiding garlic and does better in mild climates.

The skin color (white or purple) is more a matter of variety than flavor. To start in pots, either type works; what matters is starting from big, healthy cloves.

Pot and planting

1. At least 8-10 inches deep and a good width: each plant needs its space.
2. Loose, well-draining soil mixed with some compost. Garlic rots in waterlogged soil.
3. Bury each clove pointy end up, about 2 inches deep.
4. Leave 4-6 inches between cloves. A long planter box fits several.

Sun, water and care

• Sun: the more the better; at least 6 hours of direct sun a day.
• Water: moderate and regular during growth, letting the surface dry between waterings. Stop watering about 2-3 weeks before harvest so the head can cure.
• Feeding: a dose of compost at planting is usually enough; an extra hit of nitrogen in spring helps the foliage.

The flower scapes

Hardneck garlic produces a curly flower stalk (the "scape") in spring. Cut it off as soon as it appears: that way the plant puts all its energy into fattening the head instead of flowering. The stalk is also edible and delicious sautéed.

When and how to harvest

Harvest comes in spring-summer, about 8-9 months after planting:

• The sign is that the lower leaves dry and yellow while a few green ones remain up top.
• Loosen the soil and lift the head carefully; don't pull on the stalk.
• Cure the garlic in a dry, airy, shaded spot for 2-3 weeks before storing. That way it keeps for months.

Common problems

• Small heads: small starting cloves, not enough winter cold or sun.
• Rot: overwatering or poor drainage; garlic prefers to stay dry rather than soggy.
• Premature yellow leaves: could be a nitrogen shortage or too much water.

Make the most of green garlic

If you plant a few cloves just for the greens, in a few weeks you'll have green garlic: tender green stalks, much like a chive, that you can snip for cooking. It's a way to enjoy the harvest without waiting for a head to form, ideal if you planted extra or want quick results on the balcony.

Want another easy root crop to go with your garlic? Try radishes in pots, ready in a month. And if your plants look unwell, upload a photo to the AI diagnosis.