Epazote · Shanghai, Shanghai, China
When to plant epazote in Shanghai
Main outdoor window
9-30 Mar
The window this page is built around.
Timed from last spring frost
2 March
In Shanghai, on your chosen risk.
Ready to pick
8-28 May
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 Shanghai
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.
Sow direct
9-30 Mar
One week after your last frost.
Harvest
8-28 May
Epazote through the year
Against the frost risk in Shanghai
Why these dates
Killed by frost, having usually already scattered enough seed to return.
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. Epazote are timed for direct sowing 1 weeks after it, and this page simply resolves those offsets against the frost date computed for Shanghai.
The median frost-free season here is 287 days, against 60 to 80 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Growing epazote in Shanghai
When should I plant epazote in Shanghai?
Aim for 9-30 Mar in an average year. If you would rather not gamble on the weather, wait until 21 Mar - 11 Apr - by then frost has finished in nine years out of ten.
When will epazote be ready to harvest in Shanghai?
Expect to start picking around 8-28 May, based on 60 to 80 days to maturity from the planting date calculated for this location.
How much frost will epazote tolerate?
Killed by frost, having usually already scattered enough seed to return.