When to plant swiss chard in St. Petersburg
Swiss chard is cold-hardy, so every date keys off St. Petersburg's frost dates.
Step 1 · Sow
Direct sow outdoors
Jan 7 – Jan 28
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Feb 26 – Mar 8
Picking runs until conditions turn against the crop.
Window
Days to maturity
50 – 60 d
From sowing to first pick.
Common questions
When can I sow swiss chard outdoors in St. Petersburg?
Direct-sow around early January (Jan 7–Jan 28) in St. Petersburg, based on its local frost dates. Confidence 77%.
When will swiss chard be ready to harvest in St. Petersburg?
Expect to harvest from around late February (Feb 26–Mar 8) in St. Petersburg, based on its local frost dates. Confidence 71%.
How long is the growing season in St. Petersburg?
St. Petersburg has roughly 365 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 St. Petersburg's frost dates.
Confidence 79/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.