Radish · Hanzhong, Shaanxi, China
When to plant radishes in Hanzhong
Main outdoor window
13-20 Feb
The window this page is built around.
Timed from last spring frost
13 March
In Hanzhong, on your chosen risk.
Ready to pick
7-15 Mar
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 Hanzhong
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 for autumn
20 Sep - 11 Oct
Counting back 44 days from your first frost so the crop matures in time.
Sow direct
13-20 Feb
Four weeks before your last frost.
Harvest
7-15 Mar
Radishes through the year
Against the frost risk in Hanzhong
Why these dates
Sow every week in spring and autumn. Summer sowings turn woody and hot - stop when daytime temperatures pass 25C and resume in late summer.
Handles -6C easily and is often the first and last thing harvested in the year.
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. Radishes are timed for direct sowing 4 weeks before it, and this page simply resolves those offsets against the frost date computed for Hanzhong.
The median frost-free season here is 256 days, against 22 to 30 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Hanzhong
Other vegetables to time
Growing radishes in Hanzhong
When should I plant radishes in Hanzhong?
Aim for 13-20 Feb in an average year. If you would rather not gamble on the weather, wait until 24 Feb - 3 Mar - by then frost has finished in nine years out of ten.
When will radishes be ready to harvest in Hanzhong?
Expect to start picking around 7-15 Mar, based on 22 to 30 days to maturity from the planting date calculated for this location.
How much frost will radishes tolerate?
Handles -6C easily and is often the first and last thing harvested in the year.