When to plant Leeks in Fowler, CO

Leeks planted in Fowler between April 12 and May 3 matures in 90–150 days — well before the October 9 first frost. A second sowing from July 31 to August 14 extends the harvest into fall.

When to Plant Leeks in Fowler, CO

Leeks are a mild, sweet allium that produces long white shanks. They are more refined than onions and are a key ingredient in soups, stews, and gratins.

Fowler, Colorado is in USDA Zone 6a. The average last spring frost is April 26 and the first fall frost is October 9, giving you a growing season of approximately 166 days.

At an elevation of 4,145 feet, Otero County receives approximately 14.2 inches of rainfall annually with predominantly loam soil. Summer highs average 90°F, providing good warmth for Leeks during the growing season. With low rainfall, drip irrigation is essential for growing Leeks successfully. Mulch heavily to conserve soil moisture.

Fowler, CO (Zone 6a) Moderate season

166 days

❄

Last Spring Frost April 26

➔ 166 growing days ➔

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First Fall Frost October 9

Fowler Soil Profile

Soil Type

Loam

Soil pH

6.0-7.0

Drainage

Well Drained

Zone Compatibility for Leeks Zones 3a – 10b

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a You 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Ideal (data available) Suitable Marginal Not recommended

Leeks Planting Timeline — Fowler, CO

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Last Frost

First Frost

Start Indoors

Mar 22 – Apr 5

Transplant

Apr 26 – May 10

Direct Sow

Apr 12 – May 3

Fall Sowing

Jul 31 – Aug 14

Harvest

Jul 26 – Oct 11

Growing season Start indoors Transplant Direct sow Harvest

Leeks Planting Calendar

Activity	When	Date Range
Start Indoors	March 22	Mar 22 – Apr 5
Transplant Outdoors	April 26	Apr 26 – May 10
Direct Sow	April 12	Apr 12 – May 3
Harvest	July 26	Jul 26 – Oct 11
Fall Sowing	July 31	Jul 31 – Aug 14

Plant 1" deep · 15" apart · Rows 24" apart

Month-by-Month Timeline

Month	Activities
January	—
February	—
March	Start Indoors
April	Start Indoors Transplant Outdoors Direct Sow
May	Transplant Outdoors Direct Sow
June	—
July	Fall Sowing Harvest
August	Fall Sowing Harvest
September	Harvest
October	Harvest
November	—
December	—

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

Moderate — regular watering

📅 Days to Maturity

90–150 days

🧪 Soil pH

Needs 6–7 · Your soil: N/A

🗺️ USDA Zone

Zone 6a

📆 Growing Season

166 days in Otero County

Growing Tips for Fowler

Start seeds indoors 10-12 weeks before last frost. Transplant into trenches and hill soil around stems as they grow to increase the white portion. Harvest as needed.

Companion Planting

Good Companions

Avoid Planting Near

Check more plant combinations with our Companion Planting Checker →

Leeks in Other Locations

When should I plant Leeks in Fowler, CO?

In Fowler, CO, plant Leeks after the last frost (around April 26) and before the first frost (around October 9). Best results when soil holds above 50°F.

What growing zone is Fowler, CO for Leeks?

Fowler sits in USDA Zone 6a. Leeks grows reliably in zones 3a through 10b, so it's a good fit here.

Can Leeks grow in Fowler's climate?

Yes — Leeks grows well in Fowler's temperate climate. Fowler averages a 166-day frost-free season, with last frost around April 26 and first frost around October 9.

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Your Otero County Garden Planner — Free

A 22-page printable planner built for Otero County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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