Guide
How Far Apart to Plant Cauliflower (Rows + Raised Bed)
Space cauliflower 18 inches apart in rows 24 to 36 inches apart, or 1 plant per square foot in a raised bed. Spacing table, layouts, and a calculator.
The short answer
Space cauliflower plants 18 inches apart in rows 24 to 36 inches apart. In a raised bed or square-foot garden, give each plant a full square foot (1 per square), or stagger them on an 18-inch triangular grid to fit a few more. That spacing lets heads size up and keeps air moving between plants.
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Cauliflower spacing in rows vs a raised bed
The number you need depends on how you garden. A row gardener measures in inches between plants and between rows. A raised-bed gardener thinks in squares.
For traditional rows, set cauliflower 18 inches apart down the row, with 24 to 36 inches between rows. The wider gap suits big fall varieties and gives you a path to walk and cut.
In a raised bed you drop the between-row gap. You plant on a grid instead, with 1 cauliflower per square foot. Same plant, same density, just counted a different way.
These numbers sit inside what US extension services publish. The University of Florida IFAS Extension lists 12 to 18 inches in-row with rows 12 to 40 inches apart, and the University of Arkansas Cooperative Extension puts it at 18 to 24 inches in-row with rows 24 to 36 inches apart, wider for fall plantings. The site's default of 18 inches is the workable middle, and the calculator lets you nudge it.
Cauliflower spacing by method
This table gives you the spacing three ways, so you can plant the same bed however you garden. Frame it against your own setup: rows for the in-ground gardener, the grid for the raised bed.
| Method | Spacing | Plants per area |
|---|---|---|
| Rows (in-ground) | 18″ in-row, 24–36″ between rows | About 4 to 5 per 10 ft of row |
| Square-foot grid | 18″ on a grid | 1 per square foot |
| Triangular (offset) | 18″ staggered | About 15% more than square |
The in-row inch and the per-square count describe the same density. A plant that wants 18 inches in a row wants about a square foot in a grid, which is why cauliflower lands at 1 per square. For the full crop-by-crop view, the plant spacing chart lays out in-row inches and square-foot counts side by side.
Square vs triangular layout
A raised bed gives you a choice most row gardeners never think about: how to stagger the plants. The layout changes how many heads fit.
Take a 4 ft by 8 ft bed and cauliflower at 18 inches:
- Square spacing: 10 plants (5 down the 8-foot length, 2 across the 4-foot width).
- Triangular packing: 9 plants. The staggered rows give up one plant to the short edges.
Pro tip
Square spacing wastes the diagonal. Triangular (offset) spacing staggers every other row, so each plant nests into the gap between two plants in front of it. That fits about 15% more plants in a large bed, per Michigan State University Extension. The gain grows with bed size. In a small bed the offset rows lose plants to the edges, so the calculator shows the real count for your dimensions.
Square-foot gardening counts 1 cauliflower per square, which pencils out to 32 plants in that 4 by 8 bed. That is too tight for full-size heads. The per-square count is a starting point, not a law, and cauliflower is one of the crops where the honest answer is to give it the room.
Why spacing matters for cauliflower
Cauliflower rewards air and space more than most vegetables. Get the spacing right and the heads form tight and white. Get it wrong and you fight small heads and disease all season.
Three things spacing buys you:
- Bigger heads. Each plant needs full sun and a clear root zone to bulk up a single main head. Crowd it and the head stays small and loose.
- Airflow against disease. Cauliflower leaves are broad and they hold humidity. Eighteen inches of gap lets air dry the leaves, which cuts leaf diseases like downy mildew.
- Room to work. You wrap the outer leaves over the head to blanch it, then cut it clean. Spacing gives you a path to reach in and do both.
Common mistake
Planting cauliflower at salad-green density to "fit more in." This brassica needs a full 18 inches. Pack it to 6 or 8 inches and you get a bed of leaves with golf-ball heads, plus trapped humid air that feeds disease. Thin to one plant per 18 inches and let each one earn its space.
Common spacing mistakes
Most cauliflower spacing problems come from treating it like a small crop. It is a big brassica and it acts like one.
The frequent errors:
- Spacing by seed packet alone. Packet ranges run wide. Match the variety to the extension range and default to 18 inches for full heads.
- Skipping the between-row gap. In rows, 24 to 36 inches between rows is not optional. Skinny rows shade the lower leaves.
- Forgetting the plant gets wide. A cauliflower plant can span 24 to 30 inches of leaf. Space for the mature plant, not the transplant.
Get the bed filled and fed first, then plant. The how much compost do I need guide covers the amendment, and cauliflower is a heavy feeder that earns it. The spacing also matches how far apart to plant broccoli, its close cousin in the brassica bed.
Put your bed's numbers in
Cauliflower wants 18 inches between plants and 24 to 36 inches between rows, or a full square foot each in a raised bed. The spacing is the same density, measured the way you garden. Triangular packing buys back the diagonal that a square grid wastes.
Pick cauliflower and your bed size in the Plant Spacing Calculator to see how many plants fit in square, triangular, and square-foot layouts, with a grid preview for your exact dimensions.
Common questions
How close together can I plant cauliflower?
The tightest workable spacing is about 12 inches in-row, the bottom of the US extension range. At 12 inches the heads stay smaller. For full-size, well-curded heads, hold at 18 inches. Closer than 12 inches crowds the plants and traps humid air against the big leaves.
How many cauliflower plants fit in a 4x8 raised bed?
At 18-inch spacing, a 4 by 8 foot bed holds 10 cauliflower plants in a square grid (5 down the length, 2 across the width). A staggered triangular layout fits 9. Square-foot gardening counts 1 per square, but 32 full-size heads in that bed is too tight in practice.
Can you plant cauliflower too close?
Yes. Crowded cauliflower competes for light and food, so heads stay small and slow to form. Tight spacing also traps humid air between the broad leaves, which invites leaf diseases. Give each plant 18 inches and a clear path for air, and the heads size up better.
How far apart should cauliflower rows be?
Space cauliflower rows 24 to 36 inches apart, per US extension guidance. The wider end suits big fall varieties and gives you room to walk and cut. In a raised bed you skip rows entirely and use a 1-per-square-foot grid instead.
Is cauliflower spacing the same as broccoli?
Almost. Both are large brassicas that want about 18 inches in-row and 24 to 36 inches between rows, or 1 plant per square foot in a bed. Cauliflower is a touch fussier about even growth, so do not crowd it. See the plant spacing chart for the side-by-side.
Sources
Agronomic claims in this guide are checked against these primary sources.
- Home garden vegetable spacing — University of Arkansas Cooperative Extension
- Cauliflower — University of Florida IFAS Extension
- Square Foot Gardening — Square Foot Gardening Foundation
- Intensive gardening methods — Michigan State University Extension
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