When to Plant Asparagus in Colorado Springs, CO
Published: April 24, 2026
Asparagus Planting Dates for Colorado Springs, CO
| Start seeds indoors | Year-round |
| Last frost (average) | March 22 |
| Direct sow outdoors | February 22–March 4 |
| Minimum soil temperature | 50°F |
| Expect first harvest | February 22 |
| First fall frost (average) | November 10 |
⚠ Plant asparagus crowns in early spring as soon as soil can be worked. Plant once, harvest for 20+ years. Do not harvest first year — allow ferns to establish. Light harvest year 2, full harvest from year 3 onward.
Best Asparagus Varieties for Colorado Springs, CO
Consult a Colorado Springs-area nursery or your state extension office for asparagus varieties proven in Zone 6b.
Growing Asparagus 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 asparagus 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 asparagus 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 asparagus growing — focus on annual organic matter additions (2 to 3 inches of compost) and consistent moisture during drier months. Water asparagus 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.
Asparagus Calendar for Colorado Springs
| Month | Task |
|---|---|
| Year | Start seeds indoors under grow lights |
| March | Last frost — soil warming, prepare bed |
| February | Direct sow seeds into warm soil |
| November | First fall frost — harvest remaining, end of outdoor season |
Asparagus Tips for Colorado Springs Gardeners
- •Plant one-year-old crowns in trenches 6–8 inches deep, spread roots out, and backfill gradually as ferns grow.
- •Never harvest any spears the first year; allow ferns to develop and feed the crown for year-2 production.
- •Succession plant asparagus in Colorado Springs every 2–3 weeks through spring to extend the harvest window into summer.
Common Asparagus Pests in Colorado Springs
- •Asparagus Beetle — peaks July in Zone 6b (active May–September); monitor closely during peak season and treat early.
- •Fusarium Wilt — peaks July in Zone 6b (active May–September); soil-borne fungus causing wilting; resistant varieties and crop rotation are key.
- •Rust — peaks July in Zone 6b (active May–September); monitor closely during peak season and treat early.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Asparagus in Colorado Springs
In Colorado Springs's moderate climate, Tomato and Basil are the most beneficial plants to grow alongside asparagus. Tomato repels carrot fly while benefiting from nearby aerated soil. Keep asparagus away from Onion — it inhibits bean and pea growth through sulfur-compound allelopathy.
Frequently Asked Questions
When should I plant asparagus in Colorado Springs, CO?
In Colorado Springs (Zone 6b), direct sow asparagus around February 22–March 4. Soil must be at 50°F or warmer at 2-inch depth before sowing — cold soil rots the seeds.
What zone is Colorado Springs, CO for asparagus growing?
Colorado Springs is USDA Zone 6b. For asparagus, this means a frost-free growing season of roughly 33 weeks running from March 22 to November 10. Cool-season crops like asparagus thrive in this zone with both spring and fall planting windows available.
When is asparagus harvest season in Colorado Springs?
Expect the first asparagus harvest in Colorado Springs around February 22. This is based on 730–730 days from transplant or direct sow.
How long does it take to grow asparagus in Colorado Springs, CO?
From transplant or direct sow to first harvest, asparagus takes 730–730 days in Colorado Springs's climate. Based on a typical planting date of February 22–March 4, expect your first harvest around February 22. Colorado Springs's Zone 6b transition-zone climate produces maturity times right in the middle of the stated range.
What soil does asparagus need in Colorado Springs?
Colorado Springs's loam soil is near-ideal for asparagus. 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.