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When to plant swiss chard in Bristol

Swiss chard is cold-hardy, so every date keys off Bristol's frost dates of Apr 12.
Step 1 · Sow
Start seeds indoors
Mar 15 – Apr 5
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 29 – Apr 19
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 18 – May 28
Picking runs until conditions turn against the crop.
Step 4 · Second sowing
Autumn / second sowing
Aug 1 – Aug 15
A second window for a fall crop, timed to mature before the first frost.
Step 5 · Second harvest
Autumn crop harvest
Sep 27 – Oct 7
Maturity window for the second sowing.
Window
Days to maturity
50 – 60 d
Bristol's 204-day season leaves this much room.
Swiss chard on Bristol'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 12
NOV 11

Common questions

When can I sow swiss chard outdoors in Bristol?

Direct-sow around late March (Mar 29–Apr 19) in Bristol, based on its local frost dates. Confidence 83%.

When will swiss chard be ready to harvest in Bristol?

Expect to harvest from around mid May (May 18–May 28) in Bristol, based on its local frost dates. Confidence 75%.

When should I start swiss chard seeds indoors in Bristol?

Start seeds indoors around mid March (Mar 15–Apr 5) in Bristol, based on its local frost dates. Confidence 79%.

When can I transplant swiss chard outdoors in Bristol?

Transplant outdoors around late March (Mar 29–Apr 19) in Bristol, based on its local frost dates. Confidence 83%.

Can I plant swiss chard in autumn in Bristol?

Yes — Bristol supports a second, autumn sowing of swiss chard around early August (Aug 1–Aug 15), timed to mature before the first fall frost.

How long is the growing season in Bristol?

Bristol has roughly 204 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 Bristol's frost dates.

Confidence 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.
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