When to plant swiss chard in Bordeaux
Swiss chard is cold-hardy, so every date keys off Bordeaux's frost dates of Apr 10.
Step 1 · Sow
Start seeds indoors
Mar 13 – Apr 3
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 27 – Apr 17
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 16 – May 26
Picking runs until conditions turn against the crop.
Window
Days to maturity
50 – 60 d
Bordeaux's 209-day season leaves this much room.
Swiss chard on Bordeaux'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
FROST
FROST
APR 10
NOV 5
Common questions
When can I sow swiss chard outdoors in Bordeaux?
Direct-sow around late March (Mar 27–Apr 17) in Bordeaux, based on its local frost dates. Confidence 82%.
When will swiss chard be ready to harvest in Bordeaux?
Expect to harvest from around mid May (May 16–May 26) in Bordeaux, based on its local frost dates. Confidence 74%.
When should I start swiss chard seeds indoors in Bordeaux?
Start seeds indoors around mid March (Mar 13–Apr 3) in Bordeaux, based on its local frost dates. Confidence 78%.
When can I transplant swiss chard outdoors in Bordeaux?
Transplant outdoors around late March (Mar 27–Apr 17) in Bordeaux, based on its local frost dates. Confidence 82%.
How long is the growing season in Bordeaux?
Bordeaux has roughly 209 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 Bordeaux's frost dates.
Confidence 82/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.