🧅 Can I Plant Leek in Des Moines, IA?

2026 planting guide for Zone 5b · Last frost ~April 28 · Growing season ~169 days

✅ YES — Good time to plant for a fall harvest

Leek thrives in cool weather and can be planted now for a fall harvest. Sow seeds soon — they'll be ready around Nov 7–Dec 7, well before the average first frost around Nov 14.

Planting window: Jul 30 – Aug 13
Sow leek seeds directly now for a fall harvest. Expect to harvest around Nov 7.
Live result based on current forecast for Des Moines, IA · Updates every 6 hours
USDA Zone
5b
Last Spring Frost
~April 28
First Fall Frost
October 14
Growing Season
~169 days
Ideal Temp for Leek
45–75°F
Frost Risk
✅ Tolerant

Growing Leek in Des Moines

Des Moines's Zone 5b Great Plains climate offers about 168 frost-free days. Iowa's legendary agricultural soils — some of the richest in the world — make home vegetable gardening naturally productive. Warm-season crops need indoor starts in late March, with transplanting in late April or early May. The warm, sunny Midwestern summers accelerate growth once established, and the rich loam soils support impressive vegetable yields.

In Des Moines (last frost around April 28), leek can go out around March — approximately 4 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.

Leek thrives between 45°F and 75°F. It tolerates temperatures as low as 28°F, making it a candidate for early spring planting before the last frost date. Expect 100–130 days from transplant to first harvest. Long-season crop. Start indoors early. Very cold hardy.

Frequently Asked Questions

When can I plant leek in Des Moines, IA?

In Des Moines (last frost around April 28), leek can go out around March — approximately 4 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 Des Moines?

Des Moines, IA is in USDA Plant Hardiness Zone 5b. The last expected spring frost is around April 28, and the first fall frost arrives around October 14. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.

Is it safe to plant leek outside in Des Moines right now?

That depends on the current weather forecast. Leek needs temperatures above 28°F (ideally 45–75°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 leek in Des Moines 2026?

Yes — Leek grows well in Des Moines, IA. With a Zone 5b climate and a growing season of ~169 days, Des Moines is well-suited for cool-season crops like leek. As a frost-tolerant crop, leek can even go out a few weeks before the last frost date.

Grow Leek in Other Cities

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