When to plant in Loveland, CO
USDA Zone 5bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Loveland, Colorado — all computed from Loveland's nearest NOAA weather station.
Zone 5b means Loveland sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
LOVELAND 2N · 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 Loveland’s own odds, recorded at LOVELAND 2N.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 4 | May 22 | May 11 | Sep 8 | Sep 22 | Oct 4 |
| 32°F | May 22 | May 10 | Apr 30 | Sep 15 | Oct 1 | Oct 13 |
| 28°F | May 14 | May 2 | Apr 17 | Sep 22 | Oct 10 | Oct 22 |
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 Loveland, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 18 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.
Loveland planting FAQ
When is the last spring frost in Loveland, CO?
Plan for the last spring frost in Loveland around May 10 (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 Loveland, CO?
The first fall frost in Loveland typically arrives around October 1 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Loveland in?
Loveland is in USDA hardiness zone 5b. In zone 5b, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Loveland?
There are roughly 144 frost-free days in Loveland (a short growing season), running from the average last frost around May 10 to the first fall frost near October 1.
When should I plant tomatoes in Loveland?
In Loveland, start tomato seeds indoors around March 15–March 29, then transplant seedlings outdoors around May 17 once the danger of frost has passed.
Never miss a window in Loveland
An email when it’s time to start seeds, transplant, and sow — timed to Loveland’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at LOVELAND 2N, 3 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 Loveland, CO — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00055236. Retrieved from https://blissgarden.com/colorado/loveland.