Water spinach · Soweto, Gauteng, South Africa
When to plant water spinach in Soweto
Main outdoor window
31 Aug - 21 Sep
The window this page is built around.
Timed from last spring frost
17 August
In Soweto, on your chosen risk.
Ready to pick
29 Nov - 30 Apr
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 Soweto
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
20 Jul - 10 Aug
Four weeks before your last frost, under cover or on a windowsill.
Sow direct
31 Aug - 21 Sep
Two weeks after your last frost.
Plant out
31 Aug - 21 Sep
Two weeks after your last frost.
Harvest
29 Nov - 30 Apr
Water spinach through the year
Against the frost risk in Soweto
Why these dates
Start indoors four weeks before the last frost and plant out two weeks after it into soil kept permanently wet. Cut 20cm of tip growth and it regrows within a fortnight.
Damaged at about 5C, long before frost. It needs consistently warm nights and stops dead in a cool spell.
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. Water spinach are timed from 4 weeks before that frost for an indoor start, with planting out 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Soweto.
The median frost-free season here is 292 days, against 45 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 Soweto
Other vegetables to time
Growing water spinach in Soweto
When should I plant water spinach in Soweto?
Aim for 31 Aug - 21 Sep in an average year. If you would rather not gamble on the weather, wait until 15 Sep - 6 Oct - by then frost has finished in nine years out of ten.
When will water spinach be ready to harvest in Soweto?
Expect to start picking around 29 Nov - 30 Apr, based on 45 to 60 days to maturity from the planting date calculated for this location.
How much frost will water spinach tolerate?
Damaged at about 5C, long before frost. It needs consistently warm nights and stops dead in a cool spell.