Turnip · Olathe, Kansas, United States
When to plant turnips in Olathe
Main outdoor window
17-31 Mar
The window this page is built around.
Timed from last spring frost
14 April
In Olathe, on your chosen risk.
Ready to pick
26 Apr - 11 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 Olathe
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
28 Jul - 18 Aug
Counting back 69 days from your first frost so the crop matures in time.
Sow direct
17-31 Mar
Four weeks before your last frost.
Harvest
26 Apr - 11 May
Turnips through the year
Against the frost risk in Olathe
Why these dates
Autumn crops sown eight to ten weeks before first frost are sweeter and less prone to woodiness than anything grown into summer heat.
Tolerates -8C. Roots hold in the ground well past the first frosts.
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. Turnips are timed for direct sowing 4 weeks before it, and this page simply resolves those offsets against the frost date computed for Olathe.
The median frost-free season here is 195 days, against 40 to 55 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Olathe
Other vegetables to time
Growing turnips in Olathe
When should I plant turnips in Olathe?
Aim for 17-31 Mar in an average year. If you would rather not gamble on the weather, wait until 25 Mar - 8 Apr - by then frost has finished in nine years out of ten.
When will turnips be ready to harvest in Olathe?
Expect to start picking around 26 Apr - 11 May, based on 40 to 55 days to maturity from the planting date calculated for this location.
How much frost will turnips tolerate?
Tolerates -8C. Roots hold in the ground well past the first frosts.