Broccoli · Zhu Cheng City, Shandong, China
When to plant broccoli in Zhu Cheng City
Main outdoor window
17 Mar - 7 Apr
The window this page is built around.
Timed from last spring frost
31 March
In Zhu Cheng City, on your chosen risk.
Ready to pick
16 May - 15 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 Zhu Cheng City
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
10 Feb - 3 Mar
Seven weeks before your last frost, under cover or on a windowsill.
Sow for autumn
10-31 Jul
Counting back 104 days from your first frost so the crop matures in time.
Plant out
17 Mar - 7 Apr
Two weeks before your last frost.
Harvest
16 May - 15 Jun
Broccoli through the year
Against the frost risk in Zhu Cheng City
Why these dates
Aim to have heads maturing before summer heat or after it. A midsummer maturity date produces small, loose, bitter heads no matter how well you grow the plant.
Transplants take -6C. Purple sprouting types are far hardier and are grown deliberately through winter for a spring crop.
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. Broccoli are timed from 7 weeks before that frost for an indoor start, with planting out 2 weeks before it, and this page simply resolves those offsets against the frost date computed for Zhu Cheng City.
The median frost-free season here is 226 days, against 60 to 90 days to maturity for this crop counted from planting out. That margin is what decides whether a late sowing is worth attempting.
Also in Zhu Cheng City
Other vegetables to time
Growing broccoli in Zhu Cheng City
When should I plant broccoli in Zhu Cheng City?
Aim for 17 Mar - 7 Apr in an average year. If you would rather not gamble on the weather, wait until 28 Mar - 18 Apr - by then frost has finished in nine years out of ten.
When will broccoli be ready to harvest in Zhu Cheng City?
Expect to start picking around 16 May - 15 Jun, based on 60 to 90 days to maturity from the planting date calculated for this location.
How much frost will broccoli tolerate?
Transplants take -6C. Purple sprouting types are far hardier and are grown deliberately through winter for a spring crop.