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Yes, you can grow broccoli in Colorado, and it’s actually one of the better cool-season crops for our climate.
If you’ve been wondering if you can grow broccoli in Colorado, the short answer is absolutely.
Colorado’s cool spring and fall temperatures suit broccoli well, especially along the Front Range and in higher elevations.
Broccoli grows best when it matures in cool weather, which is exactly what Colorado offers in spring and fall.
In this post, we’ll cover why you can grow broccoli in Colorado, the best planting times, and how to keep your plants happy from transplant to harvest.
Why You Can Grow Broccoli in Colorado
You can grow broccoli in Colorado because broccoli loves the same conditions our state does well in spring and fall.
Here’s why broccoli thrives here:
1. Colorado’s Cool Seasons Match Broccoli’s Needs
Broccoli is a cool-season vegetable that grows best when daytime temperatures sit between 60°F and 70°F.
Colorado’s spring and fall deliver exactly that kind of weather.
That’s a big part of why you can grow broccoli in Colorado so successfully.
2. Our Sunny Days Fuel Healthy Growth
Broccoli needs full sun, at least six hours a day, and Colorado delivers sunshine in abundance.
Those bright days help plants grow strong stems and tight, compact heads.
Just be ready to water more often, since our sun and dry air pull moisture from the soil fast.
3. Broccoli Handles Colorado’s Altitude
Broccoli grows well from the plains up to about 7,000 feet.
Higher elevations actually have an advantage here.
Cooler mountain air means broccoli can grow through summer in places where the plains get too hot.
4. Short Season Varieties Work Great Here
Our growing window between frosts is short, but fast-maturing broccoli varieties fit right in.
Look for varieties that mature in 50 to 65 days, like ‘Calabrese’ or ‘Green Comet’.
These early types let you grow broccoli in Colorado before summer heat arrives.
When to Plant Broccoli in Colorado
Timing is everything when you grow broccoli in Colorado, because heat is the enemy.
Here’s how to plan your planting:
1. Start Spring Broccoli Indoors
Start seeds indoors about six to eight weeks before your last frost date.
Along the Front Range, that’s usually late February to mid-March.
Set transplants out in April or early May while the air is still cool.
2. Plant a Fall Crop in July
Fall is often the better season to grow broccoli in Colorado.
Sow seeds directly or set transplants in early to mid-July.
The plants mature as temperatures drop, and cool fall nights make for sweet, crisp heads.
3. Watch Your Elevation
Gardeners above 6,000 feet can plant later into spring and even grow broccoli through summer.
Lower elevations heat up faster, so aim to finish harvest before the 80s arrive.
How to Grow Broccoli in Colorado Successfully
Once you know you can grow broccoli in Colorado, a few care tips make all the difference.
Here’s what your plants need:
1. Water Consistently
Colorado’s dry air and wind dry out soil quickly.
Give broccoli about one to one and a half inches of water per week.
Steady moisture keeps heads from turning woody or bolting early.
2. Amend Your Soil
Broccoli is a heavy feeder and loves rich, well-drained soil.
Work compost into your beds before planting and side-dress with a balanced fertilizer a few weeks in.
3. Use Row Cover for Pests
Cabbage worms love broccoli as much as we do.
Floating row cover keeps moths from laying eggs on your plants.
Check leaf undersides regularly and pick off any caterpillars you spot.
4. Harvest at the Right Time
Cut the main head while buds are still tight and green, before yellow flowers open.
Leave the plant in place and you’ll often get smaller side shoots to harvest later.
So, Can You Grow Broccoli in Colorado?
You can grow broccoli in Colorado, and our cool springs and crisp falls make it a natural fit.
With the right timing, steady watering, and a little pest protection, you can grow broccoli in Colorado that rivals anything at the farmers market.
Plant short-season varieties, dodge the summer heat, and you’ll be harvesting fresh heads from your own garden in no time.