When to plant in Newton, KS
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Newton, Kansas — is derived from the closest NOAA station with complete climate normals.
Zone 6b means Newton sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
NEWTON · 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 Newton’s own odds, recorded at NEWTON.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 6 | Apr 24 | Apr 10 | Oct 1 | Oct 16 | Oct 28 |
| 32°F | Apr 27 | Apr 14 | Mar 31 | Oct 12 | Oct 25 | Nov 7 |
| 28°F | Apr 20 | Apr 4 | Mar 18 | Oct 20 | Nov 3 | Nov 19 |
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 Newton, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 43 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.
Newton planting FAQ
When is the last spring frost in Newton, KS?
Newton'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 Newton, KS?
In Newton, the first 32°F freeze of fall lands around October 25 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Newton in?
Newton 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 Newton?
There are roughly 194 frost-free days in Newton (a moderate growing season), running from the average last frost around April 14 to the first fall frost near October 25.
When should I plant tomatoes in Newton?
In Newton, start tomato seeds indoors around February 17–March 3, then transplant seedlings outdoors around April 21 once the danger of frost has passed.
Never miss a window in Newton
An email when it’s time to start seeds, transplant, and sow — timed to Newton’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at NEWTON, 2 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 Newton, KS — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00145744. Retrieved from https://blissgarden.com/kansas/newton.