When to plant in Edgewater, CO
Planting dates worked out from Edgewater's own frost records, not a generic zone chart.
Safe to plant out
May 20
1 year in 10 has a later frost
Average last frost
May 7
about a 50% chance of a later one
Average first fall frost
Sep 30
1 year in 10 by Sep 13
Frost-free days
146
median, 1991–2020
Station used: Wheat Ridge 2 · 4.9 km away · station 1644 m, town 1640 m. How we match towns to stations
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Mar 25 – Apr 8 | May 20 – Jun 3 | Jul 14 |
| Sweet pepper | Mar 11 – Mar 25 | May 20 – Jun 3 | Jul 19 |
| Lettuce (leaf) | Mar 5 – Mar 12 | Apr 9 – Apr 23 | May 19 |
| Peas | — | Mar 26 – Apr 23 | May 20 |
| Bush beans | — | May 13 – Jun 3 | Jul 2 |
| Carrot | — | Apr 16 – May 28 | Jun 15 |
| Beet | — | Apr 10 – May 22 | May 30 |
| Potato | — | Apr 16 – May 7 | Jun 25 |
| Kale | Feb 26 – Mar 12 | Apr 9 – Apr 23 | May 22 |
| Broccoli | Feb 26 – Mar 12 | Apr 9 – Apr 30 | Jun 8 |
| Cucumber | Apr 22 – Apr 29 | May 20 – Jun 3 | Jul 9 |
| Summer squash and zucchini | Apr 22 – Apr 29 | May 20 – Jun 3 | Jul 4 |
| Winter squash | Apr 22 – Apr 29 | May 20 – Jun 3 | Aug 8 |
| Sweet corn | — | May 13 – Jun 3 | Jul 12 |
| Onion (from sets) | — | Apr 9 – Apr 30 | Jul 8 |
| Garlic | — | Sep 16 – Oct 14 (fall) | following summer |
| Spinach | — | Mar 26 – Apr 23 | May 3 |
| Basil | Apr 8 – Apr 22 | May 20 – Jun 3 | Jul 16 |
Edgewater's weather over time
How the growing season has shifted here, year by year, from the station's own records.
Each year's last spring frostLong-term trend
See the data as a table
| Year | Last spring frost |
|---|---|
| 1981 | May 10 |
| 1982 | May 7 |
| 1983 | May 21 |
| 1984 | May 8 |
| 1985 | May 14 |
| 1986 | May 18 |
| 1987 | Apr 22 |
| 1989 | May 5 |
| 1990 | May 10 |
| 1991 | May 13 |
| 1992 | Apr 26 |
| 1993 | May 11 |
| 1994 | Apr 30 |
| 1995 | May 4 |
| 1996 | Apr 29 |
| 1997 | May 3 |
| 1998 | Apr 29 |
| 1999 | May 12 |
| 2000 | May 13 |
| 2001 | May 21 |
| 2002 | May 24 |
| 2003 | May 11 |
| 2004 | May 14 |
| 2005 | May 3 |
| 2006 | May 11 |
| 2007 | Apr 26 |
| 2008 | May 11 |
| 2009 | Apr 28 |
| 2012 | Apr 28 |
| 2013 | May 4 |
| 2014 | May 14 |
| 2015 | May 13 |
| 2016 | May 8 |
| 2017 | May 20 |
| 2018 | Apr 26 |
| 2019 | May 24 |
| 2020 | Apr 19 |
| 2021 | May 12 |
| 2022 | May 22 |
| 2023 | Apr 24 |
| 2024 | Apr 28 |
| 2025 | Apr 21 |
| 2026 | May 7 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1981 | 159 |
| 1982 | 148 |
| 1984 | 138 |
| 1985 | 131 |
| 1986 | 131 |
| 1987 | 166 |
| 1990 | 145 |
| 1991 | 128 |
| 1992 | 163 |
| 1993 | 124 |
| 1994 | 143 |
| 1995 | 138 |
| 1996 | 149 |
| 1997 | 158 |
| 1998 | 160 |
| 1999 | 138 |
| 2000 | 131 |
| 2001 | 110 |
| 2002 | 140 |
| 2003 | 125 |
| 2004 | 152 |
| 2005 | 156 |
| 2006 | 135 |
| 2007 | 164 |
| 2008 | 148 |
| 2009 | 156 |
| 2012 | 159 |
| 2013 | 152 |
| 2014 | 121 |
| 2015 | 163 |
| 2016 | 149 |
| 2017 | 141 |
| 2018 | 166 |
| 2019 | 135 |
| 2020 | 142 |
| 2021 | 153 |
| 2022 | 147 |
| 2023 | 165 |
| 2024 | 179 |
| 2025 | 180 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1981 | 18.2 °C |
| 1982 | 17.1 °C |
| 1984 | 15.7 °C |
| 1985 | 16.7 °C |
| 1986 | 17.0 °C |
| 1987 | 16.9 °C |
| 1990 | 17.0 °C |
| 1991 | 16.7 °C |
| 1992 | 17.0 °C |
| 1993 | 15.9 °C |
| 1994 | 17.7 °C |
| 1995 | 15.6 °C |
| 1996 | 17.0 °C |
| 1997 | 16.5 °C |
| 1998 | 17.2 °C |
| 1999 | 16.1 °C |
| 2000 | 18.0 °C |
| 2001 | 17.7 °C |
| 2002 | 18.0 °C |
| 2003 | 17.2 °C |
| 2004 | 16.4 °C |
| 2005 | 17.2 °C |
| 2006 | 17.6 °C |
| 2007 | 17.5 °C |
| 2008 | 16.5 °C |
| 2012 | 18.7 °C |
| 2013 | 16.9 °C |
| 2014 | 16.7 °C |
| 2015 | 17.3 °C |
| 2016 | 17.3 °C |
| 2017 | 17.2 °C |
| 2018 | 18.1 °C |
| 2019 | 17.2 °C |
| 2020 | 17.7 °C |
| 2021 | 17.3 °C |
| 2022 | 17.9 °C |
| 2023 | 16.9 °C |
| 2024 | 18.2 °C |
| 2025 | 17.8 °C |
| 2026 | 19.3 °C |
What this means for you: Since 1981, Edgewater's last spring frost has come about 1 day earlier per decade, on average. The frost-free season has grown by about 4 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Wheat Ridge 2 (NOAA GHCN-Daily). Years with too many missing days are left out.