When to plant in Lenexa, KS
USDA Zone 6bLenexa, Kansas frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6b, Lenexa gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
OLATHE 3E · 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 Lenexa’s own odds, recorded at OLATHE 3E.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 2 | Apr 19 | Apr 5 | Oct 2 | Oct 20 | Oct 31 |
| 32°F | Apr 24 | Apr 10 | Mar 27 | Oct 13 | Oct 29 | Nov 12 |
| 28°F | Apr 17 | Mar 31 | Mar 13 | Oct 23 | Nov 6 | Nov 25 |
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 Lenexa, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 14 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.
Lenexa planting FAQ
When is the last spring frost in Lenexa, KS?
Plan for the last spring frost in Lenexa around April 10 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Lenexa, KS?
Expect Lenexa's first fall frost near October 29 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Lenexa in?
Lenexa is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Lenexa?
Lenexa has about 202 frost-free days — a moderate growing season — between the average last spring frost (April 10) and first fall frost (October 29).
When should I plant tomatoes in Lenexa?
For Lenexa, sow tomatoes indoors about February 13–February 27 and move the seedlings out around April 17, after the last spring frost.
Never miss a window in Lenexa
An email when it’s time to start seeds, transplant, and sow — timed to Lenexa’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Shawnee · 6 km
- Olathe · 9 km
- Merriam · 11 km
- Overland Park · 13 km
- Prairie Village · 15 km
- Leawood · 17 km
- Kansas City · 18 km
- Gardner · 20 km
Frost dates recorded at OLATHE 3E, 9 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 Lenexa, KS — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00145972. Retrieved from https://blissgarden.com/kansas/lenexa.