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.
Try it — Plant Spacing Calculator
Full calculatorExtra to cover losses (10% is typical).
You can plant
32plants
- Per row
- 8
- Rows
- 4
- Buy (incl. spare)
- 36 plants
Cauliflower spacing in rows vs a raised bed
Each cauliflower gets 18 inches, in a row or in a bed. You grow one head per plant, so every plant needs the room to finish it.
In the ground, set plants 18 inches apart down the row. Leave 24 to 36 inches between rows so you can walk in to tie leaves and cut heads.
In a raised bed, drop the walking rows. Plant on a grid at 1 cauliflower per square foot. The table shows how the counts line up.
| Method | Spacing | Plants per area |
|---|---|---|
| Rows (in-ground) | 18″ in-row, 24–36″ between rows | About 6 to 7 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 |
For other crops side by side, see the plant spacing chart.
Why 18 inches? Every extension range allows it
Eighteen inches is the one number that fits inside every extension range below. Some sources go tighter, some go wider. None rule out 18.
| Extension source | In-row | Between rows |
|---|---|---|
| University of Florida IFAS | 12–18″ | 12–40″, by variety |
| Utah State | 12–18″ | 2–3 ft |
| University of Arkansas | 18–24″ | 24–36″ |
| Illinois Extension | 18–24″ | Not listed |
| Iowa State | 18–24″ | 24–30″ |
The low end, 12 inches, is the tightest any source here allows. Expect smaller heads there.
The high end, 24 inches, is for fall crops. The calculator lets you nudge the number either way.
Why cauliflower punishes crowding
Cauliflower has no second chance. A crowded plant makes a small head, and that is all you get.
- One head per plant. Cauliflower does not send up side shoots after the cut, per Iowa State and Illinois Extension. Broccoli does, so a crowded broccoli spacing still gives you a second pick. Cauliflower cannot.
- It hates a pause. Mississippi State Extension says any stop in growth from drought, heat, or cold can make the head fail. Growers call this buttoning: a tiny head that forms too early and never fills out.
- Crowding is a stress. Arkansas Extension's fix for poor heads includes one plain line: "Do not crowd the cauliflower transplants."
- Wet leaves brown the curd. The curd is the white head you eat. Illinois Extension says downy mildew browns it and is brought on by wet conditions. Raised beds and anything that helps air and soil drain lower the risk.
Common mistake
Planting cauliflower at lettuce density to "fit more in." At 6 or 8 inches you get a bed of leaves and small heads, plus damp air that feeds disease. Thin to one plant every 18 inches. Each plant only makes one head, so make it a good one.
Leave room to blanch the heads
White cauliflower needs a hand to stay white. Your spacing has to let you reach it.
When the head is 2 to 3 inches across, pull the big outer leaves over it and tie them. This is called blanching. It shades the head so it stays white and mild, per Arkansas and Illinois Extension. The head is ready 7 to 12 days later.
Self-blanching varieties curl their own leaves over the head. Illinois Extension says tying is not needed in cool weather, and the trait is strongest in fall. Green, purple, and orange types skip blanching, per Iowa State.
No extension source gives self-blanching types a different spacing. The 18 inches stays the same. What changes is how often you reach in.
Pro tip
In a 4-foot-wide raised bed, the center line is 2 feet from either edge. Reaching a head near the middle means leaning over big leaves. If your bed is wide or hard to get around, pick a self-blanching variety and save your back.
Fall cauliflower gets the wider spacing
Plant a fall crop toward 24 inches in the row. Both Arkansas and Illinois Extension say to use the wider spacing for fall plantings.
Variety matters too. UF/IFAS says the best row spacing depends on the variety. So read the seed packet, then stay inside the extension range.
- Spring crop: 18 inches in-row, 24 to 36 inches between rows.
- Fall crop: 18 to 24 inches in-row, leaning wide.
- Raised bed: 1 per square foot, or 18 inches on a triangular grid.
For timing, see when to plant cauliflower.
Square vs triangular in a 4x8 bed
A staggered layout usually fits more plants. In a small bed at 18 inches, it fits one fewer.
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 offset row loses one plant at the short edge.
Pro tip
Square spacing wastes the diagonal. Triangular (offset) spacing shifts every other row half a space, so each plant nests into the gap between two others. That fits about 15% more plants in a large bed, per Michigan State University Extension. In a small bed the offset rows lose plants to the edges, so the calculator shows the real count for your size.
Square-foot gardening counts 1 cauliflower per square. In that 4 by 8 bed that is 32 plants. That is too tight for full-size heads. Treat the per-square count as a start, and give cauliflower the room.
Planting mistakes that shrink heads
Cauliflower is a big brassica. Space it for the plant it becomes, not the seedling you set out.
- Spacing for the transplant. Cornell puts a mature plant's spread at 1.3 to 3 feet. Measure for that.
- Skinny paths between rows. Keep 24 to 36 inches. Narrow rows leave no room to walk in, tie leaves, or cut heads.
- Old, root-bound transplants. Utah State and Iowa State say larger, older transplants are more likely to button. Set out young plants.
- Trusting the seed packet alone. Packet ranges run wide. Check it against the extension table above.
Fill and feed the bed before you plant. Cauliflower is a heavy feeder, and the how much compost do I need guide covers the amount. Cauliflower and cabbage are the same species, so how far apart to plant cabbage and the cabbage companion plants list are good next reads. When the heads fill out, check when to harvest cauliflower.
Put your bed's numbers in
Give cauliflower 18 inches between plants and 24 to 36 inches between rows. In a raised bed, give it a full square foot. Lean wider for a fall crop.
Pick cauliflower and your bed size in the Plant Spacing Calculator. It shows how many plants fit in square, triangular, and square-foot layouts, with a grid preview for your exact bed.
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. Lean wide for a fall crop, which Arkansas and Illinois Extension say gets the wider spacing. Wide rows also give 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.
How many heads of cauliflower do you get per plant?
One. Each cauliflower plant makes a single head and, unlike broccoli, does not send up side shoots after you cut it, per Iowa State and Illinois Extension. So the number of plants you space into the bed is the number of heads you harvest.
Why are my cauliflowers all leaves and no head?
Stress is the usual cause. Extension sources list dry soil, cold snaps, low nitrogen, and transplant shock. Old, root-bound transplants are also more likely to form a tiny early head (called buttoning) or none at all. Keep the plants growing steadily and do not crowd them.
Why is cauliflower difficult to grow?
It needs steady, unbroken growth from seedling to harvest. Mississippi State Extension says any pause caused by drought, heat, or cold can make the head fail to develop. Plant on time, water evenly, feed well, and give each plant its full 18 inches.
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
- Cauliflower (Home Gardening Series FSA-6007) — University of Arkansas Cooperative Extension
- Cauliflower — University of Illinois Extension
- Growing Cauliflower in the Home Garden — Iowa State University Extension and Outreach
- Cauliflower in the Garden — Utah State University Extension
- Cauliflower — Mississippi State University Extension
- Growing Guide - Cauliflower — Cornell Cooperative Extension
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