How Far Apart To Plant Cauliflower And Broccoli

Cauliflower and broccoli should be planted about 18 to 24 inches apart.
 
That spacing gives each plant enough room to grow without competing for sunlight, water, or nutrients.
 
If you’ve been wondering how far apart to plant cauliflower and broccoli, the short answer is simple: give them space, and they’ll reward you with big, healthy heads.
 
Broccoli and cauliflower are both heavy feeders with large leaves, so crowding them is one of the biggest mistakes home gardeners make.
 
In this post, we’ll break down the ideal spacing for cauliflower and broccoli, how to space them in rows, and a few tips to keep both crops thriving side by side.
 
Let’s dig in.
 

How Far Apart to Plant Cauliflower and Broccoli

The recommended distance for planting cauliflower and broccoli is 18 to 24 inches apart within a row.
 
That range works whether you’re planting broccoli and cauliflower together or growing each one separately.
 
Here’s why that spacing matters so much:
 

1. Room for Big Leaves

Broccoli and cauliflower plants grow wide, not just tall.
 
Each plant can spread 18 to 24 inches across, and those big outer leaves need space to soak up sunlight.
 
When you plant cauliflower and broccoli too close, the leaves overlap and shade each other out.
 
Less sunlight means smaller heads and weaker plants overall.
 

2. Airflow Prevents Disease

Good airflow is one of the best defenses against common brassica problems like powdery mildew and downy mildew.
 
If you plant broccoli and cauliflower too tightly, moisture gets trapped between the leaves.
 
That damp, still air is exactly where fungal diseases love to grow.
 
Spacing cauliflower and broccoli properly lets breezes move through the patch and keeps the foliage dry.
 

3. Roots Need Their Own Space

Both crops have shallow but wide-spreading root systems.
 
When broccoli and cauliflower are planted too close, their roots compete for water and nutrients in the same patch of soil.
 
That competition stresses the plants and often leads to small, loose heads instead of tight, hefty ones.
 
Giving each plant 18 to 24 inches means every root system gets its fair share.
 

Row Spacing for Broccoli and Cauliflower

Spacing within a row is only half the story.
 
You also need to think about how far apart to plant cauliflower and broccoli rows from each other.
 
Here’s how to set it up:
 

1. Keep Rows 24 to 36 Inches Apart

Leave 24 to 36 inches between rows of broccoli and cauliflower.
 
That gap gives you room to walk, weed, and harvest without trampling the plants.
 
It also keeps airflow moving between rows, which helps prevent disease.
 

2. Use the Square Foot Method

If you’re gardening in raised beds, plant one broccoli or cauliflower per square foot only if you’re using a tight intensive system.
 
For most home gardens, though, giving each plant its own 2-foot square is the safer bet.
 
That’s essentially the same as spacing cauliflower and broccoli 18 to 24 inches apart in every direction.
 

3. Stagger Planting for a Longer Harvest

Instead of planting every broccoli and cauliflower on the same day, stagger them by two weeks.
 
That way you’re not drowning in heads all at once, and each plant still gets its full spacing.
 

Tips for Planting Cauliflower and Broccoli Together

Broccoli and cauliflower are close cousins, so they grow well side by side.
 
Just keep these pointers in mind:
 

1. Match Their Growing Conditions

Both crops love full sun, cool weather, and rich, well-drained soil.
 
Plant cauliflower and broccoli in the same bed and they’ll be happy with the same care routine.
 

2. Feed Them Well

Broccoli and cauliflower are hungry plants.
 
Mix compost into the soil before planting, then side-dress with a balanced fertilizer a few weeks in.
 
Well-fed plants handle close-ish spacing far better than starved ones.
 

3. Water Consistently

Give broccoli and cauliflower about an inch of water per week.
 
Consistent moisture keeps heads forming evenly and prevents bolting.
 

4. Watch for Pests

Cabbage worms love both crops.
 
Check leaf undersides often, and row covers can keep the moths from laying eggs in the first place.
 

So, How Far Apart to Plant Cauliflower and Broccoli?

Cauliflower and broccoli should be planted about 18 to 24 inches apart, with rows 24 to 36 inches apart.
 
That spacing gives each plant room for its leaves, roots, and airflow, which means bigger heads and healthier crops.
 
If you’ve been unsure how far apart to plant cauliflower and broccoli, stick with that range and you can’t go wrong.
 
Happy planting.