When to plant in Leavenworth, KS
USDA Zone 6bLeavenworth, 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, Leavenworth gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
LEAVENWORTH · 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 Leavenworth’s own odds, recorded at LEAVENWORTH.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 3 | Apr 21 | Apr 8 | Oct 1 | Oct 18 | Oct 30 |
| 32°F | Apr 25 | Apr 12 | Mar 31 | Oct 13 | Oct 27 | Nov 7 |
| 28°F | Apr 17 | Apr 3 | Mar 18 | Oct 23 | Nov 4 | Nov 18 |
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 Leavenworth, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
Leavenworth planting FAQ
When is the last spring frost in Leavenworth, KS?
Leavenworth's average last spring frost falls near April 12 — 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 Leavenworth, KS?
In Leavenworth, the first 32°F freeze of fall lands around October 27 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Leavenworth in?
Leavenworth 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 Leavenworth?
Leavenworth has about 198 frost-free days — a moderate growing season — between the average last spring frost (April 12) and first fall frost (October 27).
When should I plant tomatoes in Leavenworth?
For Leavenworth, sow tomatoes indoors about February 15–March 1 and move the seedlings out around April 19, after the last spring frost.
Never miss a window in Leavenworth
An email when it’s time to start seeds, transplant, and sow — timed to Leavenworth’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Lansing · 9 km
- Kansas City · 27 km
- Smithville · 32 km
- Atchison · 32 km
- Gladstone · 34 km
- Shawnee · 35 km
- Kansas City · 39 km
- Merriam · 39 km
Frost dates recorded at LEAVENWORTH, 1 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 Leavenworth, KS — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00144588. Retrieved from https://blissgarden.com/kansas/leavenworth.