When to plant swiss chard in Strasbourg

Swiss chard is cold-hardy, so every date keys off Strasbourg's frost dates of Apr 9.
Step 1 · Sow
Start seeds indoors
Mar 12 – Apr 2
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 26 – Apr 16
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 15 – May 25
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jul 27 – Aug 10
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Sep 22 – Oct 2
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Strasbourg's 206-day season leaves this much room.
Swiss chard on Strasbourg'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 9
OCT 30

Common questions

When can I sow swiss chard outdoors in Strasbourg?

Direct-sow around late March (Mar 26–Apr 16) in Strasbourg, based on its local frost dates. Confidence 89%.

When will swiss chard be ready to harvest in Strasbourg?

Expect to harvest from around mid May (May 15–May 25) in Strasbourg, based on its local frost dates. Confidence 80%.

When should I start swiss chard seeds indoors in Strasbourg?

Start seeds indoors around mid March (Mar 12–Apr 2) in Strasbourg, based on its local frost dates. Confidence 85%.

When can I transplant swiss chard outdoors in Strasbourg?

Transplant outdoors around late March (Mar 26–Apr 16) in Strasbourg, based on its local frost dates. Confidence 89%.

Can I plant swiss chard in autumn in Strasbourg?

Yes — Strasbourg supports a second, autumn sowing of swiss chard around late July (Jul 27–Aug 10), timed to mature before the first fall frost.

How long is the growing season in Strasbourg?

Strasbourg has roughly 206 frost-free days, which is enough time to grow swiss chard to maturity outdoors.

The rule of thumb

Sow swiss chard 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 Strasbourg's frost dates.

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