When to plant swiss chard in Sioux Falls

Swiss chard is cold-hardy, so every date keys off Sioux Falls's frost dates of May 1.
Step 1 · Sow
Start seeds indoors
Apr 3 – Apr 24
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 17 – May 8
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 6 – Jun 16
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Jun 29 – Jul 13
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Aug 25 – Sep 4
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Sioux Falls's 153-day season leaves this much room.
Swiss chard on Sioux Falls'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
MAY 1
OCT 2

Common questions

When can I sow swiss chard outdoors in Sioux Falls?

Direct-sow around mid April (Apr 17–May 8) in Sioux Falls, based on its local frost dates. Confidence 89%.

When will swiss chard be ready to harvest in Sioux Falls?

Expect to harvest from around early June (Jun 6–Jun 16) in Sioux Falls, based on its local frost dates. Confidence 80%.

When should I start swiss chard seeds indoors in Sioux Falls?

Start seeds indoors around early April (Apr 3–Apr 24) in Sioux Falls, based on its local frost dates. Confidence 85%.

When can I transplant swiss chard outdoors in Sioux Falls?

Transplant outdoors around mid April (Apr 17–May 8) in Sioux Falls, based on its local frost dates. Confidence 89%.

Can I plant swiss chard in autumn in Sioux Falls?

Yes — Sioux Falls supports a second, autumn sowing of swiss chard around late June (Jun 29–Jul 13), timed to mature before the first fall frost.

How long is the growing season in Sioux Falls?

Sioux Falls has roughly 153 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 Sioux Falls's frost dates.

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