When to plant swiss chard in Mesa

Swiss chard is cold-hardy, so every date keys off Mesa's frost dates of Feb 6.
Step 1 · Sow
Start seeds indoors
Jan 9 – Jan 30
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 26 – Jan 16
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Feb 14 – Feb 24
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Sep 6 – Sep 20
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Nov 2 – Nov 12
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Mesa's 303-day season leaves this much room.
Swiss chard on Mesa'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
FEB 6
DEC 6

Common questions

When can I sow swiss chard outdoors in Mesa?

Direct-sow around late December (Dec 26–Jan 16) in Mesa, based on its local frost dates. Confidence 81%.

When will swiss chard be ready to harvest in Mesa?

Expect to harvest from around mid February (Feb 14–Feb 24) in Mesa, based on its local frost dates. Confidence 76%.

When should I start swiss chard seeds indoors in Mesa?

Start seeds indoors around early January (Jan 9–Jan 30) in Mesa, based on its local frost dates. Confidence 80%.

When can I transplant swiss chard outdoors in Mesa?

Transplant outdoors around late December (Dec 26–Jan 16) in Mesa, based on its local frost dates. Confidence 81%.

Can I plant swiss chard in autumn in Mesa?

Yes — Mesa supports a second, autumn sowing of swiss chard around early September (Sep 6–Sep 20), timed to mature before the first fall frost.

How long is the growing season in Mesa?

Mesa has roughly 303 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 Mesa's frost dates.

Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.