When to plant lettuce in Des Moines

Lettuce is cold-hardy, so every date keys off Des Moines's frost dates of Apr 17.
Step 1 · Sow
Start seeds indoors
Mar 20 – Apr 10
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 27 – Apr 17
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 11 – May 26
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jul 15 – Jul 29
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Sep 5 – Sep 20
Maturity window for the second sowing.
Window
Days to maturity
45 – 60 d
Des Moines's 179-day season leaves this much room.
Lettuce on Des Moines's growing year
Frost-bounded season with crops mapped onto the 12-month axis.
Frost risk Growing Harvest
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
APR 17
OCT 16

Common questions

When can I sow lettuce outdoors in Des Moines?

Direct-sow around late March (Mar 24–Apr 14) in Des Moines, based on its local frost dates. Confidence 86%.

When will lettuce be ready to harvest in Des Moines?

Expect to harvest from around mid May (May 11–May 26) in Des Moines, based on its local frost dates. Confidence 80%.

When should I start lettuce seeds indoors in Des Moines?

Start seeds indoors around mid March (Mar 20–Apr 10) in Des Moines, based on its local frost dates. Confidence 85%.

When can I transplant lettuce outdoors in Des Moines?

Transplant outdoors around late March (Mar 27–Apr 17) in Des Moines, based on its local frost dates. Confidence 89%.

Can I plant lettuce in autumn in Des Moines?

Yes — Des Moines supports a second, autumn sowing of lettuce around mid July (Jul 15–Jul 29), timed to mature before the first fall frost.

How long is the growing season in Des Moines?

Des Moines has roughly 179 frost-free days, which is enough time to grow lettuce to maturity outdoors.

The rule of thumb

Sow lettuce as soon as the soil is workable — it tolerates cool weather and light frost. Every date on this page is derived from that rule and Des Moines's frost dates.

Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.