When to plant swiss chard in Frankfurt
Swiss chard is cold-hardy, so every date keys off Frankfurt's frost dates of Apr 24.
Step 1 · Sow
Start seeds indoors
Mar 27 – Apr 17
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 10 – May 1
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 30 – Jun 9
Picking runs until conditions turn against the crop.
Window
Days to maturity
50 – 60 d
Frankfurt's 175-day season leaves this much room.
Swiss chard on Frankfurt'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 24
OCT 16
Common questions
When can I sow swiss chard outdoors in Frankfurt?
Direct-sow around early April (Apr 10–May 1) in Frankfurt, based on its local frost dates. Confidence 72%.
When will swiss chard be ready to harvest in Frankfurt?
Expect to harvest from around late May (May 30–Jun 9) in Frankfurt, based on its local frost dates. Confidence 65%.
When should I start swiss chard seeds indoors in Frankfurt?
Start seeds indoors around late March (Mar 27–Apr 17) in Frankfurt, based on its local frost dates. Confidence 68%.
When can I transplant swiss chard outdoors in Frankfurt?
Transplant outdoors around early April (Apr 10–May 1) in Frankfurt, based on its local frost dates. Confidence 72%.
How long is the growing season in Frankfurt?
Frankfurt has roughly 175 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 Frankfurt's frost dates.
Confidence 72/100 · NASA POWER (modeled) · 1991–2020 · frost dates are probabilities, not guarantees.