When to Plant Collard Greens in Colorado Springs, CO
Published: April 24, 2026
Collard Green Planting Dates for Colorado Springs, CO
| Start seeds indoors | February 15–22 |
| Last frost (average) | March 22 |
| Transplant outdoors | March 1–11 |
| Direct sow outdoors | March 1–11 |
| Minimum soil temperature | 45°F |
| Expect first harvest | April 30 – May 15 |
| Fall crop planting | September 1–11 |
| Fall crop harvest | October 31 |
| First fall frost (average) | November 10 |
⚠ Direct sow or transplant collard greens 3–4 weeks before last frost. Extremely cold hardy — withstands temps to 15°F. Can be grown as a perennial in Zones 8+. Fall planting produces the best-flavored greens.
Best Collard Green Varieties for Colorado Springs, CO
Consult a Colorado Springs-area nursery or your state extension office for collard green varieties proven in Zone 6b.
Growing Collard Greens in Colorado Springs
Colorado Springs sits in Zone 6b, with an average last frost of March 22 and first fall frost around November 10 — giving a 233-day frost-free growing season. Cool-season crops like collard green benefit from Colorado Springs's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
Colorado Springs's moderate climate supports collard green on the standard transplant calendar with minimal special accommodation. Succession planting — sowing fresh seeds or setting new transplants every 2–3 weeks through spring — stretches the harvest window and gives you a backup crop if pests hit the first planting.
Colorado Springs's well-draining loam soils are among the best for collard green growing — focus on annual organic matter additions (2 to 3 inches of compost) and consistent moisture during drier months. Water collard green at 1 inches per week; loam holds moisture evenly without the drought-crack cycle of heavy clay or the rapid-drain losses of pure sand.
Collard Green Calendar for Colorado Springs
| Month | Task |
|---|---|
| February | Start seeds indoors under grow lights |
| March | Transplant outdoors into warm soil |
| April | Expect first harvest window to open |
| September | Start fall crop — transplants or direct sow |
| November | First fall frost — harvest remaining, end of outdoor season |
Collard Green Tips for Colorado Springs Gardeners
- •Harvest outer leaves continuously once plants reach 10 inches — the central growing point produces for months.
- •In Zones 8+ collard greens often overwinter and produce for 2–3 years as a perennial.
- •Succession plant collard green in Colorado Springs every 2–3 weeks through spring to extend the harvest window into summer.
Common Collard Green Pests in Colorado Springs
- •Cabbage Worm — peaks July in Zone 6b (active May–September); green caterpillars on brassicas; apply Bt spray or use row covers.
- •Aphid — peaks July in Zone 6b (active May–September); monitor closely during peak season and treat early.
- •Flea Beetle — peaks July in Zone 6b (active May–September); tiny black beetles that riddle leaves with holes; row covers protect seedlings.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Collard Greens in Colorado Springs
In Colorado Springs's moderate climate, Onion and Garlic are the most beneficial plants to grow alongside collard green. Onion deters carrot fly, aphids, and several root-zone pests through sulfur compounds. Keep collard green away from Tomato — it competes for nutrients or shares pest pressure.
Frequently Asked Questions
When should I plant collard green in Colorado Springs, CO?
In Colorado Springs (Zone 6b), start collard green seeds indoors around February 15–22 and transplant outdoors around March 1–11. The city's average last frost of March 22 is the anchor date — count 5 weeks back for seed starting and 3 weeks back for transplanting.
What zone is Colorado Springs, CO for collard green growing?
Colorado Springs is USDA Zone 6b. For collard green, this means a frost-free growing season of roughly 33 weeks running from March 22 to November 10. Cool-season crops like collard green thrive in this zone with both spring and fall planting windows available.
When is collard green harvest season in Colorado Springs?
Expect the first collard green harvest in Colorado Springs around April 30, with harvest continuing through May 15. This is based on 60–75 days from transplant or direct sow. A fall crop planted September 1–11 adds a second harvest around October 31.
How long does it take to grow collard green in Colorado Springs, CO?
From transplant or direct sow to first harvest, collard green takes 60–75 days in Colorado Springs's climate. Based on a typical planting date of March 1–11, expect your first harvest around April 30. Colorado Springs's Zone 6b transition-zone climate produces maturity times right in the middle of the stated range.
What soil does collard green need in Colorado Springs?
Colorado Springs's loam soil is near-ideal for collard green. Work in 2–3 inches of compost before planting to boost organic matter and nutrient content. Minimal amendment is needed beyond that — loam holds moisture evenly without the drought-crack cycle of clay or the nutrient-loss issues of sandy soil.