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When to plant swiss chard in Wellington

Swiss chard is cold-hardy, so every date keys off Wellington's frost dates of Sep 19.
Step 1 · Sow
Start seeds indoors
Aug 22 – Sep 12
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Sep 5 – Sep 26
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Oct 25 – Nov 4
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Feb 17 – Mar 3
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Apr 15 – Apr 25
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Wellington's 256-day season leaves this much room.
Swiss chard on Wellington'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
SEP 19
JUN 2

Common questions

When can I sow swiss chard outdoors in Wellington?

Direct-sow around early September (Sep 5–Sep 26) in Wellington, based on its local frost dates. Confidence 50%.

When will swiss chard be ready to harvest in Wellington?

Expect to harvest from around late October (Oct 25–Nov 4) in Wellington, based on its local frost dates. Confidence 45%.

When should I start swiss chard seeds indoors in Wellington?

Start seeds indoors around late August (Aug 22–Sep 12) in Wellington, based on its local frost dates. Confidence 48%.

When can I transplant swiss chard outdoors in Wellington?

Transplant outdoors around early September (Sep 5–Sep 26) in Wellington, based on its local frost dates. Confidence 50%.

Can I plant swiss chard in autumn in Wellington?

Yes — Wellington supports a second, autumn sowing of swiss chard around mid February (Feb 17–Mar 3), timed to mature before the first fall frost.

How long is the growing season in Wellington?

Wellington has roughly 256 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 Wellington's frost dates.

Confidence 50/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.
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