How Far Apart To Plant Cauliflower And Broccoli

How far apart to plant cauliflower and broccoli comes down to giving each plant around 18 to 24 inches of space in every direction.
 
That spacing keeps them from competing for sunlight, water, and nutrients while letting air move freely between them.
 
If you’ve been wondering how far apart to plant cauliflower and broccoli so both crops thrive, you’re in the right place.
 
In this post, we’ll walk through the ideal spacing for each crop, why that distance matters, and how to plan your beds so your cauliflower and broccoli have room to grow big and healthy heads.
 
Let’s dig in.
 

How Far Apart to Plant Cauliflower and Broccoli

The short answer is 18 to 24 inches apart, but let’s break down why that range works and how to apply it in your garden.
 

1. The Standard Spacing Range

When figuring out how far apart to plant cauliflower and broccoli, aim for 18 to 24 inches between plants within a row.
 
Broccoli tends to be the wider of the two, so give it the full 24 inches if you’re unsure.
 
Cauliflower can sit a little closer at around 18 inches, though 20 to 24 inches never hurts.
 
This spacing gives each plant enough room to develop its full leaf spread without shading its neighbor.
 

2. Row Spacing Matters Too

Plant spacing is only half the picture because your rows need breathing room as well.
 
Space rows of cauliflower and broccoli about 24 to 36 inches apart.
 
That gap lets you walk between rows for watering, weeding, and harvesting without trampling the plants.
 
It also improves airflow across the bed, which is a big deal for these brassicas.
 

3. Why This Distance Works

Both crops grow into large, leafy plants that can reach two feet across at maturity.
 
Plant them closer than 18 inches and their leaves overlap, blocking sunlight and trapping moisture.
 
That trapped moisture invites problems like powdery mildew and clubroot, which brassicas are prone to.
 
Proper spacing keeps the air moving and the leaves dry, which means healthier cauliflower and broccoli all season.
 

Spacing Cauliflower and Broccoli in Different Garden Setups

Your garden layout affects how far apart to plant cauliflower and broccoli, so here’s how to adapt the spacing to your setup.
 

1. In-Ground Rows

In a traditional row garden, plant cauliflower and broccoli 18 to 24 inches apart with 24 to 36 inches between rows.
 
Stagger the plants in a zigzag pattern if you want to squeeze a little more efficiency out of the bed.
 
Just don’t go tighter than 18 inches because crowded brassicas rarely form good heads.
 

2. Raised Beds

Raised beds dry out faster and warm up sooner, so they’re great for broccoli and cauliflower.
 
In a 4-foot-wide bed, plant two rows spaced 24 inches apart, with each plant 18 to 24 inches from its neighbor.
 
That gives you roughly four to six plants per 4×8 bed, depending on the variety.
 

3. Square Foot Gardening

If you use the square foot method, give each cauliflower or broccoli plant its own square and skip the neighbor in the next square.
 
In other words, plant one brassica per square foot grid cell but leave the adjacent cells open or fill them with a smaller crop like lettuce.
 
This keeps the effective distance between cauliflower and broccoli plants at around 24 inches.
 

Companion Planting Tips for Cauliflower and Broccoli

How far apart you plant cauliflower and broccoli also depends on what’s growing nearby.
 

1. Good Neighbors

Strong-smelling herbs like rosemary, sage, and mint help deter cabbage worms from your broccoli and cauliflower.
 
Root crops like carrots and beets grow below the surface without competing for the same space.
 
Just keep those herbs at least 12 inches from the brassica stems so they don’t shade the seedlings.
 

2. Bad Neighbors

Avoid planting cauliflower and broccoli next to tomatoes, strawberries, or pole beans.
 
Tomatoes and strawberries share soil-borne disease risks with brassicas, and beans compete heavily for nutrients.
 
Keep these crops on the other side of the garden or in a different bed entirely.
 

3. Don’t Plant Brassicas Back-to-Back

Never follow cauliflower with broccoli, or vice versa, in the same spot.
 
Both are heavy feeders and share the same pests and diseases, so rotating them to a fresh bed each year keeps the soil healthy.
 
Give it three to four years before either crop returns to the same spot.
 

Common Spacing Mistakes to Avoid

Even when you know how far apart to plant cauliflower and broccoli, a few slip-ups can undo your good planning.
 

1. Crowding Seedlings

It’s tempting to plant tightly when seedlings look tiny, but they grow fast.
 
Plant at final spacing from day one or thin them early, because moving crowded brassicas later often stunts them.
 

2. Ignoring Variety Size

Some broccoli varieties spread wide while others stay compact, so check your seed packet for mature spread.
 
If you’re growing a large heading variety, plant at the top of the range, around 24 inches, and give cauliflower the same courtesy.
 

3. Skipping Room for Harvest

Leave enough space between rows to reach the heads at harvest time.
 
Cutting a broccoli head is easy, but pulling a whole cauliflower plant out of a cramped bed is a hassle you’ll want to avoid.
 

So, How Far Apart to Plant Cauliflower and Broccoli?

How far apart to plant cauliflower and broccoli is 18 to 24 inches between plants, with 24 to 36 inches between rows.
 
That spacing gives both crops the sunlight, airflow, and nutrients they need to form tight, healthy heads.
 
Adapt the range to your garden setup, keep good neighbors nearby, and rotate your brassicas each season.
 
Follow these spacing guidelines and your cauliflower and broccoli will reward you with a harvest worth bragging about.