When to plant in Derby, KS
USDA Zone 7aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Derby, Kansas — all computed from Derby's nearest NOAA weather station.
In zone 7a, Derby supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
HAYSVILLE 3SE · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Derby’s own odds, recorded at HAYSVILLE 3SE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 7 | Apr 24 | Apr 10 | Sep 27 | Oct 12 | Oct 25 |
| 32°F | Apr 30 | Apr 14 | Mar 30 | Oct 5 | Oct 22 | Nov 4 |
| 28°F | Apr 19 | Apr 3 | Mar 16 | Oct 16 | Oct 31 | Nov 15 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Derby, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Derby planting FAQ
When is the last spring frost in Derby, KS?
Derby's average last spring frost falls near April 14 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Derby, KS?
In Derby, the first 32°F freeze of fall lands around October 22 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Derby in?
Derby is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Derby?
Derby has about 191 frost-free days — a moderate growing season — between the average last spring frost (April 14) and first fall frost (October 22).
When should I plant tomatoes in Derby?
For Derby, sow tomatoes indoors about February 17–March 3 and move the seedlings out around April 21, after the last spring frost.
Never miss a window in Derby
An email when it’s time to start seeds, transplant, and sow — timed to Derby’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Haysville · 9 km
- Wichita · 17 km
- Andover · 18 km
- Winfield · 43 km
- El Dorado · 45 km
- Newton · 54 km
- Arkansas City · 57 km
- Hutchinson · 80 km
Frost dates recorded at HAYSVILLE 3SE, 7 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Derby, KS — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00143545. Retrieved from https://blissgarden.com/kansas/derby.