🥦 Can I Plant Brussels Sprouts in Colorado Springs, CO?

2026 planting guide for Zone 5b · Last frost ~May 10 · Growing season ~143 days

⏳ WAIT — Too late to harvest before first frost (~Oct 18)

Brussels Sprouts needs at least 90 days to harvest, but there are only ~79 days before the average first fall frost around Oct 18. Wait until next spring for best results.

Planting window: Jan 27 – Feb 10 (next spring)
Skip this season. Plan to start brussels sprouts again around Jan 27 next spring.
Live result based on current forecast for Colorado Springs, CO · Updates every 6 hours
USDA Zone
5b
Last Spring Frost
~May 10
First Fall Frost
September 30
Growing Season
~143 days
Ideal Temp for Brussels Sprouts
45–65°F
Frost Risk
✅ Tolerant

Growing Brussels Sprouts in Colorado Springs

Colorado Springs at 6,035 feet sits in Zone 5b with one of the shortest growing seasons on this list — about 140 days. Late spring frosts can arrive into mid-May, and first fall frosts can come as early as late September. High-altitude sun intensity and dry air require consistent irrigation. Cold frames, row covers, and raised beds with black plastic mulch are essential tools for Colorado Springs gardeners.

In Colorado Springs (last frost around May 10), brussels sprouts can go out around March — approximately 8 weeks before the last expected frost, making it an early-season opportunity. Starting seeds indoors 12 weeks before the last frost date gives you a significant head start.

Brussels Sprouts thrives between 45°F and 65°F. It tolerates temperatures as low as 28°F, making it a candidate for early spring planting before the last frost date. Expect 90–120 days from transplant to first harvest. Long season. Best harvested after first frost — sweetens flavor.

Frequently Asked Questions

When can I plant brussels sprouts in Colorado Springs, CO?

In Colorado Springs (last frost around May 10), brussels sprouts can go out around March — approximately 8 weeks before the last expected frost, making it an early-season opportunity. For best results, start seeds indoors 12 weeks before that — giving you strong transplants ready to go out at the right time.

What is the USDA hardiness zone for Colorado Springs?

Colorado Springs, CO is in USDA Plant Hardiness Zone 5b. The last expected spring frost is around May 10, and the first fall frost arrives around September 30. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.

Is it safe to plant brussels sprouts outside in Colorado Springs right now?

That depends on the current weather forecast. Brussels Sprouts needs temperatures above 28°F (ideally 45–65°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.

Can I grow brussels sprouts in Colorado Springs 2026?

Yes — Brussels Sprouts grows well in Colorado Springs, CO. With a Zone 5b climate and a growing season of ~143 days, Colorado Springs is well-suited for cool-season crops like brussels sprouts. As a frost-tolerant crop, brussels sprouts can even go out a few weeks before the last frost date.

Grow Brussels Sprouts in Other Cities

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