When to plant in Chalco, NE
USDA Zone 6aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Chalco, Nebraska — all computed from Chalco's nearest NOAA weather station.
In zone 6a, Chalco gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
GRETNA 4NE · 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 Chalco’s own odds, recorded at GRETNA 4NE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 14 | May 1 | Apr 16 | Sep 26 | Oct 8 | Oct 21 |
| 32°F | May 4 | Apr 21 | Apr 5 | Oct 4 | Oct 18 | Oct 31 |
| 28°F | Apr 25 | Apr 10 | Mar 27 | Oct 14 | Oct 27 | Nov 10 |
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 Chalco, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 21 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.
Chalco planting FAQ
When is the last spring frost in Chalco, NE?
Plan for the last spring frost in Chalco around April 21 (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 Chalco, NE?
In Chalco, the first 32°F freeze of fall lands around October 18 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Chalco in?
Chalco is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Chalco?
Chalco has about 180 frost-free days — a moderate growing season — between the average last spring frost (April 21) and first fall frost (October 18).
When should I plant tomatoes in Chalco?
For Chalco, sow tomatoes indoors about February 24–March 10 and move the seedlings out around April 28, after the last spring frost.
Never miss a window in Chalco
An email when it’s time to start seeds, transplant, and sow — timed to Chalco’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at GRETNA 4NE, 5 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 Chalco, NE — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00253467. Retrieved from https://blissgarden.com/nebraska/chalco.