Overland Park, KS planting zone & frost dates
Overland Park is in USDA hardiness zone 6b. The last spring frost usually comes around April 10 and the first fall frost around October 29, for a growing season of about 202 days.
Planting calendar for Overland Park
Dates are counted from the average last spring frost (April 10) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Feb 13 – Feb 27 Transplant outdoors: Apr 17 – Apr 24 |
| Peppers | Start seeds indoors: Jan 30 – Feb 13 Transplant outdoors: Apr 24 – May 1 |
| Eggplant | Start seeds indoors: Jan 30 – Feb 13 Transplant outdoors: Apr 24 – May 1 |
| Broccoli | Start seeds indoors: Jan 30 – Feb 13 Transplant outdoors: Mar 13 – Mar 27 |
| Cabbage | Start seeds indoors: Jan 30 – Feb 13 Transplant outdoors: Mar 13 – Mar 27 |
| Onions (sets) | Plant outdoors: Mar 13 – Mar 27 |
| Peas | Sow outdoors: Feb 27 – Mar 13 |
| Spinach | Sow outdoors: Feb 27 – Mar 13 |
| Lettuce | Sow outdoors: Mar 13 – Mar 27 |
| Carrots | Sow outdoors: Mar 13 – Mar 27 |
| Potatoes | Plant outdoors: Mar 13 – Mar 27 |
| Beans | Sow outdoors: Apr 17 – Apr 24 |
| Sweet corn | Sow outdoors: Apr 17 – Apr 24 |
| Cucumbers | Sow outdoors: Apr 17 – Apr 24 |
| Squash & zucchini | Sow outdoors: Apr 17 – Apr 24 |
| Basil | Start seeds indoors: Feb 27 – Mar 13 Transplant outdoors: Apr 17 – Apr 24 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 3 (8 weeks before the average first fall frost on Oct 29).
Useful for zone 6b gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
- Cold frame / mini greenhouse — adds weeks to a short season
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Mar 27 | Apr 10 | Apr 24 |
| First 32°F frost in fall is before | Nov 12 | Oct 29 | Oct 13 |
How to read it: in spring there is a 10% chance of a frost after April 24, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 13. A hard freeze (28°F) usually ends around March 31.
Hardiness zone by ZIP code in Overland Park
- 66204 zone 6b
- 66207 zone 6b
- 66210 zone 6b
- 66212 zone 6b
- 66213 zone 6b
- 66214 zone 6b
- 66221 zone 6b
- 66223 zone 6b
- 66224 zone 6b
- 66225 zone 6b
- 66251 zone 6b
- 66282 zone 6b
- 66283 zone 6b
Nearby cities
- Prairie Village zone 6b, last frost Apr 4
- Merriam zone 6b, last frost Apr 4
- Leawood zone 6b, last frost Apr 10
- Lenexa zone 6b, last frost Apr 10
- Shawnee zone 6b, last frost Apr 4
- Kansas City zone 6b, last frost Apr 4
- Olathe zone 6b, last frost Apr 10
- Gardner zone 6b, last frost Apr 13
Questions
What growing zone is Overland Park, KS?
Overland Park is in USDA Plant Hardiness Zone 6b (average extreme winter low -5°F to 0°F), according to the USDA 2023 map.
When is the last frost in Overland Park?
The average last spring frost (32°F) in Overland Park is April 10. There is still a 10% chance of frost until April 24.
When can I plant tomatoes in Overland Park?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 17 – Apr 24. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Olathe 3E, KS (USC00145972), 13.1 km (8.1 mi) from the city center, elevation 322 m, based on 17 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.