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Broccoli and cauliflower should be planted about 18 to 24 inches apart to give each plant enough room to grow.
If you’re wondering how far apart do you plant broccoli and cauliflower, the short answer is that spacing matters more than most gardeners realize.
These two brassicas are close cousins, so they share similar spacing needs, and getting that distance right can mean the difference between a healthy harvest and a disappointing one.
In this post, we’ll look at how far apart to plant broccoli and cauliflower, why that spacing works, and how to adjust it for different garden setups.
Let’s dig in.
How Far Apart Do You Plant Broccoli and Cauliflower?
The recommended spacing when you plant broccoli and cauliflower is 18 to 24 inches between plants.
That range gives each plant enough room to spread its leaves without shading out its neighbor.
If you’re planting broccoli and cauliflower in rows, keep the rows about 24 to 36 inches apart too.
Here’s why that spacing works so well:
1. Room for Big Leaves
Broccoli and cauliflower both grow wide, arching leaves that need space to soak up sunlight.
When you plant broccoli and cauliflower too close, the leaves overlap and compete for light.
That competition stresses the plants and can lead to smaller heads.
2. Airflow Prevents Disease
Good airflow is one of the biggest reasons to space broccoli and cauliflower properly.
Crowded plants trap moisture, and that damp environment invites issues like downy mildew and black rot.
Giving each plant breathing room keeps the foliage dry and healthy.
3. Easy Harvesting and Feeding
When you plant broccoli and cauliflower 18 to 24 inches apart, you can walk between them easily.
That makes watering, weeding, and harvesting far less of a chore.
Spacing Tips When You Plant Broccoli and Cauliflower
Beyond the basic distance, a few smart habits will help you plant broccoli and cauliflower the right way.
1. Check Your Variety
Some broccoli and cauliflower varieties grow larger than others.
If you’re growing a compact type, you might get away with planting them 15 inches apart.
But for standard varieties, stick with 18 to 24 inches when you plant broccoli and cauliflower.
2. Consider Raised Beds
In a raised bed, you can plant broccoli and cauliflower a little closer if the soil is rich.
Just don’t go below 15 inches, or the plants will start fighting for nutrients.
3. Don’t Forget the Soil
Spacing only does so much if the soil is poor.
Broccoli and cauliflower both feed heavily, so mix in compost before you plant.
Healthy soil plus proper spacing equals big, tight heads.
Common Mistakes When You Plant Broccoli and Cauliflower
Even seasoned gardeners slip up when they plant broccoli and cauliflower.
1. Planting Too Close
The most common mistake is crowding them to fit more plants in a small space.
That backfires because stunted plants produce tiny, loose heads.
2. Ignoring Row Spacing
People often focus on plant spacing and forget the rows.
If you plant broccoli and cauliflower in rows, leave 24 to 36 inches between them for airflow and access.
3. Skipping Mulch
Mulch keeps the soil cool and moist, which broccoli and cauliflower both love.
It also suppresses weeds that would otherwise compete for space and nutrients.
So, How Far Apart Do You Plant Broccoli and Cauliflower?
You should plant broccoli and cauliflower about 18 to 24 inches apart, with rows spaced 24 to 36 inches apart.
That distance gives these brassicas the light, airflow, and nutrients they need to thrive.
If you remember to check your variety, enrich the soil, and avoid crowding, your broccoli and cauliflower will reward you with firm, flavorful heads.
Now you know exactly how far apart to plant broccoli and cauliflower for a garden that produces its best.