Grow Garlic in Containers: 5 Tips for Pots, Crates and Clear Planters

These setups run from a clear plastic food tub on the windowsill to a black crate holding six cloves across, and the right one depends on whether you want to grow greens inside or put bulbs through a cold season outside.

A clove planted indoors without cold weeks stays small and single, while the same clove with 8 inches of depth and a season outside can fill a kitchen jar by June.

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1. Planting Cloves

Fall is when garlic cloves get their start, and timing matters more than technique.

I set mine 3 to 6 inches apart, root-end down, buried just deep enough that a 1- to 2-inch blanket of soil covers the pointed tip. A light misting settles them in without washing them loose.

The papery skin stays on; it shields against rot and infection through the cold months ahead. Hardneck varieties handle winter freeze best in northern zones, while softneck tolerates milder southern winters where the ground barely stiffens.

Plant between September and November, before real frost arrives. The cloves need that stretch of chilling to divide into separate pieces; without it, you will get one round snow garlic bulb, edible but awkward to store and use.

2. Potting Soil with Compost

Garden soil in a pot is a fast track to soggy, rotted garlic.

I use bagged potting mix blended with compost, about 30 percent by volume, or worm castings if I have them. The loose structure drains freely and still feeds the long months of slow growth.

Terra cotta looks classic but turns you into a daily waterer for eight or nine months.

Worse, moisture seeps into the pores and freezes, flaking and cracking the pot by spring. Plastic, glazed ceramic, or fiberstone sits outside without complaint.

An 8-inch depth is the floor for root room; I prefer wider to hold more cloves and stretch the watering interval.

My own pot is wide enough that the cloves sit a few inches apart, which keeps them from crowding each other.

3. Harvesting Garlic

Yellow lower leaves are the signal, not the calendar, though most garlic put in during fall ripens the following summer after its long wait underground.

I stop watering once the tops start turning, then give it 2 weeks until roughly a third of each plant has yellowed and flopped.

Each clove matures on its own schedule, so I check bulbs individually rather than clearing the whole container at once.

Yanking the stalk by hand usually snaps it clean off, which leaves the bulb in the dirt and costs you the leaves you need for curing.

I work my hand down to feel the bulb, then ease it up with fingers or a pitchfork stabbed below the roots. Digging near the stalk itself, I learned early, punctures bulbs more often than you would expect.

4. Clear Plastic Container Setup

A clear plastic food container makes garlic sprouting visible in a way soil hides. I can watch roots reach and shoots push without disturbing anything, which satisfies the impatient side of gardening.

Soil goes in first, cloves press in root-down with the pointed end up, then a thin layer of mix covers them.

Moisture stays even without waterlogging, and the shallow depth suits the early weeks before transplanting or finishing in a deeper pot.

For real harvest, this size is only a starting point.

Garlic roots eventually want 8 inches of depth and a drainage hole; I move these starts to a proper container once green shoots stand several inches tall. The clear walls then become a lesson in root development, not a permanent home.

5. Black Plastic Crate Planter

Black plastic crates stack, store, and cost next to nothing come planting time.

Depth is the question to settle first.

8 inches is the minimum for garlic to bulb properly; shallower and you get cramped roots and thin results. Most crates run deeper than they look, but I measure before filling.

Black plastic absorbs summer heat, which can stress roots in warm months.

In cooler spring and fall weather that same warmth helps starts along; I would shade the southern side in July if I were keeping a crop through peak heat.

For a single-season run planted in fall and pulled in June, the tradeoff barely registers.

Growing Garlic Indoors

Growing garlic indoors for full bulbs is more trouble than most kitchens can handle. A windowsill rarely gets cold enough long enough for the cloves to shift from growing leaves to building bulbs.

I have kept pots in an unheated garage through winter, which stays cold enough to trigger bulbing without freezing the roots solid.

Come spring, the plants still need serious light, so I haul them back outdoors or park them on the sunniest windowsill I’ve got.

Skip the cold treatment and indoor garlic tops out at salad greens. The leaves clip cleanly for cooking, but the clove beneath stays small and single.

For someone in an apartment with no outdoor space at all, greens are a reasonable harvest; just know what you are signing up for before you fill the pot.

Container Materials

Plastic holds moisture longer than terracotta, which matters when a container sits through eight or nine months of growth.

I learned the hard way that terra cotta in winter means ice in the pores, and by spring the pot has chipped or split.

Fiberstone sits in the middle, heavier than plastic but less thirsty than clay.

Drainage holes are not optional. I add gravel to the bottom of any pot so water does not pool where the roots sit.

Moving pots into an unheated garage for the coldest nights protects the roots from hard freeze while still letting the bulbs feel enough cold to develop properly.

A bedsheet draped over the top, weighted at the edges, works in a pinch if frost cloth is not on hand.

Spacing and Depth

The width matters too, since cloves need 3 to 6 inches of space on all sides. A 24-inch container at proper depth holds four to six plants, which is enough garlic for most kitchens.

Smaller, single-clove pots make sense if you rearrange your space often or grow on a balcony where every inch counts. One healthy clove per pot also means less weight to lift when you move them inside for a hard freeze.

Four good-sized heads in June beat eight stunted ones that barely qualify as roasting garlic.

Garlic has a relatively short root system, so you don’t need super deep pots to grow massive bulbs. Instead, all you need is a container that’s at least 8 to 10 inches deep.

— The Old Farmer’s Almanac

Temperature Requirements

I water until the soil freezes, then let the pot rest under mulch or in a sheltered spot until spring growth starts.

In a warm-winter zone, you can fake the chill by storing loose seed garlic in a refrigerator drawer for the required weeks before planting.

I have not tried this myself, though sources I read agree it works for gardeners who lack a true cold season.

The garlic still needs its long, warm summer afterward to finish bulbing, so indoor temperature control alone will not carry a crop from clove to harvest.

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