When to plant in Fountain, CO
USDA Zone 6aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Fountain, Colorado — all computed from Fountain's nearest NOAA weather station.
In zone 6a, Fountain gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
COLORADO SPRINGS MUNI AP · 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 Fountain’s own odds, recorded at COLORADO SPRINGS MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 26 | May 14 | May 3 | Sep 17 | Oct 1 | Oct 12 |
| 32°F | May 15 | May 3 | Apr 22 | Sep 26 | Oct 8 | Oct 19 |
| 28°F | May 5 | Apr 24 | Apr 8 | Oct 4 | Oct 16 | Oct 29 |
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 Fountain, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 29 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.
Fountain planting FAQ
When is the last spring frost in Fountain, CO?
Fountain's average last spring frost falls near May 3 — 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 Fountain, CO?
Expect Fountain's first fall frost near October 8 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Fountain in?
Fountain 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 Fountain?
Fountain has about 158 frost-free days — a moderate growing season — between the average last spring frost (May 3) and first fall frost (October 8).
When should I plant tomatoes in Fountain?
For Fountain, sow tomatoes indoors about March 8–March 22 and move the seedlings out around May 10, after the last spring frost.
Never miss a window in Fountain
An email when it’s time to start seeds, transplant, and sow — timed to Fountain’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Fort Carson · 6 km
- Security-Widefield · 8 km
- Cimarron Hills · 19 km
- Colorado Springs · 21 km
- Black Forest · 42 km
- Pueblo West · 42 km
- Monument · 45 km
- Pueblo · 47 km
Frost dates recorded at COLORADO SPRINGS MUNI AP, 13 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 Fountain, CO — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00093037. Retrieved from https://blissgarden.com/colorado/fountain.