When to plant in Pueblo, CO
USDA Zone 6aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Pueblo, Colorado — all computed from Pueblo's nearest NOAA weather station.
In zone 6a, Pueblo gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
WFO PUEBLO · 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 Pueblo’s own odds, recorded at WFO PUEBLO.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 23 | May 9 | Apr 28 | Sep 22 | Oct 2 | Oct 13 |
| 32°F | May 12 | Apr 30 | Apr 16 | Sep 28 | Oct 9 | Oct 22 |
| 28°F | May 4 | Apr 18 | Apr 3 | Oct 5 | Oct 18 | Oct 31 |
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 Pueblo, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 10 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.
Pueblo planting FAQ
When is the last spring frost in Pueblo, CO?
On average, the last spring frost in Pueblo is around April 30 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Pueblo, CO?
The first fall frost in Pueblo typically arrives around October 9 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Pueblo in?
Pueblo 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 Pueblo?
Pueblo has about 162 frost-free days — a moderate growing season — between the average last spring frost (April 30) and first fall frost (October 9).
When should I plant tomatoes in Pueblo?
For Pueblo, sow tomatoes indoors about March 5–March 19 and move the seedlings out around May 7, after the last spring frost.
Never miss a window in Pueblo
An email when it’s time to start seeds, transplant, and sow — timed to Pueblo’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Pueblo West · 16 km
- Fountain · 47 km
- Fort Carson · 48 km
- Security-Widefield · 54 km
- Cañon City · 57 km
- Cimarron Hills · 66 km
- Colorado Springs · 68 km
- Black Forest · 89 km
Frost dates recorded at WFO PUEBLO, 8 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 Pueblo, CO — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00058992. Retrieved from https://blissgarden.com/colorado/pueblo.