Green bean · Boksburg, Gauteng, South Africa
When to plant green beans in Boksburg
Main outdoor window
12-26 Aug
The window this page is built around.
Timed from last spring frost
5 August
In Boksburg, on your chosen risk.
Ready to pick
1-11 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 Boksburg
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
12-26 Aug
One week after your last frost.
Harvest
1-11 Oct
Green beans through the year
Against the frost risk in Boksburg
Why these dates
Sow a short row every two weeks from one week after last frost until ten weeks before first frost. Beans crop heavily for a fortnight then decline, so succession matters more than quantity.
Beans are killed by the lightest frost at any stage. They also germinate poorly below 15C, so patience in spring pays.
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. Green beans are timed for direct sowing 1 weeks after it, and this page simply resolves those offsets against the frost date computed for Boksburg.
The median frost-free season here is 304 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 Boksburg
Other vegetables to time
Growing green beans in Boksburg
When should I plant green beans in Boksburg?
Aim for 12-26 Aug in an average year. If you would rather not gamble on the weather, wait until 6-20 Sep - by then frost has finished in nine years out of ten.
When will green beans be ready to harvest in Boksburg?
Expect to start picking around 1-11 Oct, based on 50 to 60 days to maturity from the planting date calculated for this location.
How much frost will green beans tolerate?
Beans are killed by the lightest frost at any stage. They also germinate poorly below 15C, so patience in spring pays.