Swiss chard · Shuozhou, Shanxi, China
When to plant swiss chard in Shuozhou
Main outdoor window
24 Apr - 15 May
The window this page is built around.
Timed from last spring frost
8 May
In Shuozhou, on your chosen risk.
Ready to pick
13-23 Jun
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Shuozhou
Each window is a range, not a single day. Earlier in the range buys you a longer season; later in it buys you a safer one.
Start indoors
3-24 Apr
Five weeks before your last frost, under cover or on a windowsill.
Sow for overwintering
28 Jun - 19 Jul
Counting back 74 days from your first frost so the crop matures in time.
Sow direct
24 Apr - 15 May
Two weeks before your last frost.
Plant out
1-22 May
One week before your last frost.
Harvest
13-23 Jun
Swiss chard through the year
Against the frost risk in Shuozhou
Why these dates
One spring sowing usually lasts until hard frost. In mild climates it overwinters and produces an early spring flush before bolting.
Takes -5C without protection. Under a cloche it will hold through much colder weather and resume growth in late winter.
Seed packets and extension guides express timing as weeks either side of the last spring frost, because that is the only reference point that travels. Swiss chard are timed from 5 weeks before that frost for an indoor start, with planting out 1 weeks before it, and this page simply resolves those offsets against the frost date computed for Shuozhou.
The median frost-free season here is 147 days, against 50 to 60 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Shuozhou
Other vegetables to time
Growing swiss chard in Shuozhou
When should I plant swiss chard in Shuozhou?
Aim for 24 Apr - 15 May in an average year. If you would rather not gamble on the weather, wait until 2-23 May - by then frost has finished in nine years out of ten.
When will swiss chard be ready to harvest in Shuozhou?
Expect to start picking around 13-23 Jun, based on 50 to 60 days to maturity from the planting date calculated for this location.
How much frost will swiss chard tolerate?
Takes -5C without protection. Under a cloche it will hold through much colder weather and resume growth in late winter.