How Far Apart to Plant Garlic

Garlic spacing is one of those numbers the charts never quite agree on. One says 4 inches, the next says 6, a market grower says 8. They can all be right, because the number depends on how big you want the bulbs and how you garden.

The honest starting point is the extension range: 4 to 6 inches between cloves. Where you land inside it is the rest of this guide.

Row spacing vs raised-bed spacing

The right number changes with how you garden. In-ground rows and square-foot beds are two different math problems.

For traditional rows, space cloves about 6 inches apart in rows 12 inches apart. That row width is enough to hand-weed and mulch. Ohio State Extension goes wider, 18 to 24 inches between rows, when you need to walk or run a tiller down them.

For a raised bed or square-foot garden, the grid is tighter. Plant 9 cloves per square foot, which is the square-foot-gardening standard for alliums on a 4-inch grid. Mel Bartholomew counts garlic, onions, and beets the same way, 9 to a square.

Garlic is planted in fall and sits in the bed all winter, so the spacing you set now decides the whole next season. If you are still timing the planting, our guide to when to plant garlic covers the fall window.

Garlic spacing by method, at a glance

Pick how you garden, then read the spacing across. These ranges come from Ohio State, Cornell, and Minnesota Extension guidance.

The pattern is simple. Tighter spacing fits more heads, wider spacing grows bigger heads. Most home gardeners want the bigger heads.

Square vs triangular layout

How you arrange the cloves, not just how far apart, changes how many fit. A triangular (offset) grid packs in roughly 15% more plants than a straight square grid over a large area.

In a square grid, every clove lines up in neat rows and columns. In a triangular grid, each row shifts over by half a space, so cloves nestle into the gaps of the row beside them. That offset is what buys the extra density.

A 4x8 bed (about 1.2 x 2.4 m) at a 6-inch grid fits 128 cloves square, but 140 triangular. The 15% edge shows up once the bed is big enough for the offset pattern to repeat.

square grid (6in)        triangular grid (6in)
●  ●  ●  ●  ●            ●  ●  ●  ●  ●
●  ●  ●  ●  ●              ●  ●  ●  ●
= 128 cloves             = 140 cloves

Run your own bed size through the Plant Spacing Calculator and it counts both layouts so you can see which wins for your exact dimensions.

Why spacing matters for garlic

Spacing is not about being tidy. It decides how big your bulbs get. Cloves planted too close compete for water, nutrients, and light, so each plant has less to spend on sizing up its bulb.

Cornell Small Farms is direct about it: crowded garlic plants compete with each other, roots fight over the same nutrients, and leaves overlap and shade one another. The result is a bed full of small heads.

Air matters too. Wider spacing lets the leaves dry faster after rain, which slows down rust and other leaf diseases that spread on wet foliage. Give the plants room and you get fewer problems and bigger bulbs at once.

Common spacing mistakes

A few errors show up again and again in crowded garlic beds. Each one is easy to avoid once you know the number.

• Planting closer than 4 inches because the cloves look small going in.
• Forgetting that each clove becomes a full leafy plant by spring.
• Skipping row width so there is no room to weed or mulch.
• Counting square-foot squares but planting the biggest cloves too tight.

The fix for all four is the same. Space for the bulb you want, not the clove you plant, and give air a path between every plant.

The whole job is one decision and one measurement. Plant cloves 6 inches apart as your default, tighter only for small seed stock. For a side-by-side with other crops, the plant spacing chart lists every vegetable, and when to harvest garlic picks up the season next summer.

Got your bed size? Open the Plant Spacing Calculator and see exactly how many cloves fit, square or triangular.