Leaf amaranth · Yangpu, Shanghai, China
When to plant leaf amaranth in Yangpu
Main outdoor window
17 Mar - 14 Apr
The window this page is built around.
Timed from last spring frost
3 March
In Yangpu, on your chosen risk.
Ready to pick
1 Jun - 31 Oct
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 Yangpu
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
17 Mar - 14 Apr
Two weeks after your last frost.
Harvest
1 Jun - 31 Oct
Leaf amaranth through the year
Against the frost risk in Yangpu
Why these dates
Sow onto warm soil from two weeks after the last frost and every two weeks after that. Cut the main stem at about 30cm and it branches into a bushier, more productive plant.
Killed at 0C with no margin at all. Sow late, harvest until the first autumn frost, and expect the plants to collapse overnight when it comes.
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. Leaf amaranth are timed for direct sowing 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Yangpu.
The median frost-free season here is 286 days, against 30 to 45 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Yangpu
Other vegetables to time
Growing leaf amaranth in Yangpu
When should I plant leaf amaranth in Yangpu?
Aim for 17 Mar - 14 Apr in an average year. If you would rather not gamble on the weather, wait until 28 Mar - 25 Apr - by then frost has finished in nine years out of ten.
When will leaf amaranth be ready to harvest in Yangpu?
Expect to start picking around 1 Jun - 31 Oct, based on 30 to 45 days to maturity from the planting date calculated for this location.
How much frost will leaf amaranth tolerate?
Killed at 0C with no margin at all. Sow late, harvest until the first autumn frost, and expect the plants to collapse overnight when it comes.