When to plant in Marriott-Slaterville, UT
Planting dates worked out from Marriott-Slaterville's own frost records, not a generic zone chart.
Safe to plant out
May 9
1 year in 10 has a later frost
Average last frost
Apr 21
about a 50% chance of a later one
Average first fall frost
Oct 24
1 year in 10 by Oct 13
Frost-free days
182
median, 1991–2020
Station used: Ogden Pioneer Ph · 6.6 km away · station 1326 m, town 1296 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 14 – Mar 28 | May 9 – May 23 | Jul 3 |
| Sweet pepper | Feb 28 – Mar 14 | May 9 – May 23 | Jul 8 |
| Lettuce (leaf) | Feb 17 – Feb 24 | Mar 24 – Apr 7 | May 3 |
| Peas | — | Mar 14 – Apr 11 | May 8 |
| Bush beans | — | May 2 – May 23 | Jun 21 |
| Carrot | — | Mar 31 – May 12 | May 30 |
| Beet | — | Mar 26 – May 7 | May 15 |
| Potato | — | Mar 31 – Apr 21 | Jun 9 |
| Kale | Feb 10 – Feb 24 | Mar 24 – Apr 7 | May 6 |
| Broccoli | Feb 10 – Feb 24 | Mar 24 – Apr 14 | May 23 |
| Cucumber | Apr 11 – Apr 18 | May 9 – May 23 | Jun 28 |
| Summer squash and zucchini | Apr 11 – Apr 18 | May 9 – May 23 | Jun 23 |
| Winter squash | Apr 11 – Apr 18 | May 9 – May 23 | Jul 28 |
| Sweet corn | — | May 2 – May 23 | Jul 1 |
| Onion (from sets) | — | Mar 24 – Apr 14 | Jun 22 |
| Garlic | — | Oct 8 – Nov 5 (fall) | following summer |
| Spinach | — | Mar 14 – Apr 11 | Apr 21 |
| Basil | Mar 28 – Apr 11 | May 9 – May 23 | Jul 5 |
Marriott-Slaterville'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 |
|---|---|
| 1902 | May 4 |
| 1903 | May 19 |
| 1904 | May 8 |
| 1905 | Apr 4 |
| 1909 | May 1 |
| 1910 | Apr 16 |
| 1941 | Apr 20 |
| 1942 | May 16 |
| 1943 | Apr 11 |
| 1944 | May 2 |
| 1945 | Apr 17 |
| 1946 | May 1 |
| 1947 | Apr 12 |
| 1948 | May 9 |
| 1949 | Apr 14 |
| 1950 | May 9 |
| 1951 | May 13 |
| 1952 | Apr 9 |
| 1953 | May 11 |
| 1954 | May 2 |
| 1955 | May 15 |
| 1956 | May 14 |
| 1957 | Apr 27 |
| 1958 | Apr 27 |
| 1959 | May 3 |
| 1960 | May 19 |
| 1961 | May 6 |
| 1962 | Apr 30 |
| 1963 | Apr 28 |
| 1964 | May 6 |
| 1965 | May 7 |
| 1966 | Apr 28 |
| 1967 | May 13 |
| 1968 | Apr 23 |
| 1969 | Apr 30 |
| 1970 | May 11 |
| 1971 | Apr 27 |
| 1972 | May 1 |
| 1973 | Apr 21 |
| 1974 | May 20 |
| 1975 | May 25 |
| 1976 | Apr 26 |
| 1977 | May 18 |
| 1978 | May 5 |
| 1979 | May 9 |
| 1980 | Apr 12 |
| 1981 | Apr 5 |
| 1982 | May 11 |
| 1983 | May 12 |
| 1984 | May 15 |
| 1985 | Apr 24 |
| 1986 | Apr 26 |
| 1987 | Apr 19 |
| 1988 | May 2 |
| 1989 | Mar 22 |
| 1990 | Apr 29 |
| 1991 | Apr 30 |
| 1992 | Mar 22 |
| 1993 | Apr 12 |
| 1994 | Apr 10 |
| 1995 | Apr 14 |
| 1996 | Apr 28 |
| 1998 | Apr 18 |
| 1999 | May 10 |
| 2000 | May 12 |
| 2001 | Apr 14 |
| 2002 | May 8 |
| 2003 | Apr 8 |
| 2005 | Apr 11 |
| 2006 | Apr 19 |
| 2007 | Apr 21 |
| 2009 | Apr 27 |
| 2010 | May 7 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1903 | 163 |
| 1904 | 161 |
| 1905 | 187 |
| 1941 | 167 |
| 1942 | 160 |
| 1943 | 190 |
| 1944 | 194 |
| 1945 | 184 |
| 1946 | 161 |
| 1947 | 194 |
| 1948 | 149 |
| 1949 | 176 |
| 1950 | 143 |
| 1951 | 144 |
| 1952 | 205 |
| 1953 | 163 |
| 1954 | 164 |
| 1955 | 143 |
| 1956 | 162 |
| 1957 | 160 |
| 1958 | 150 |
| 1959 | 151 |
| 1960 | 147 |
| 1961 | 140 |
| 1962 | 189 |
| 1963 | 178 |
| 1964 | 163 |
| 1966 | 167 |
| 1967 | 168 |
| 1968 | 168 |
| 1969 | 164 |
| 1970 | 149 |
| 1971 | 153 |
| 1972 | 146 |
| 1973 | 187 |
| 1974 | 167 |
| 1975 | 150 |
| 1976 | 174 |
| 1977 | 145 |
| 1978 | 135 |
| 1979 | 173 |
| 1980 | 185 |
| 1981 | 193 |
| 1982 | 149 |
| 1983 | 179 |
| 1984 | 151 |
| 1985 | 166 |
| 1986 | 194 |
| 1987 | 204 |
| 1988 | 188 |
| 1990 | 170 |
| 1991 | 176 |
| 1992 | 225 |
| 1993 | 200 |
| 1994 | 201 |
| 1995 | 191 |
| 1996 | 171 |
| 1998 | 199 |
| 1999 | 158 |
| 2000 | 173 |
| 2001 | 180 |
| 2002 | 157 |
| 2003 | 205 |
| 2006 | 181 |
| 2007 | 182 |
| 2009 | 182 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1903 | 17.8 °C |
| 1904 | 18.2 °C |
| 1905 | 18.1 °C |
| 1910 | 19.1 °C |
| 1912 | 16.4 °C |
| 1941 | 17.9 °C |
| 1942 | 18.6 °C |
| 1943 | 19.6 °C |
| 1944 | 18.7 °C |
| 1945 | 17.8 °C |
| 1946 | 19.9 °C |
| 1948 | 19.2 °C |
| 1949 | 19.2 °C |
| 1950 | 17.4 °C |
| 1951 | 17.3 °C |
| 1952 | 19.5 °C |
| 1953 | 18.5 °C |
| 1954 | 19.5 °C |
| 1955 | 18.4 °C |
| 1956 | 19.2 °C |
| 1957 | 18.4 °C |
| 1958 | 19.3 °C |
| 1959 | 18.5 °C |
| 1960 | 19.4 °C |
| 1961 | 19.2 °C |
| 1962 | 18.9 °C |
| 1963 | 18.4 °C |
| 1964 | 17.4 °C |
| 1965 | 17.3 °C |
| 1966 | 19.6 °C |
| 1967 | 18.3 °C |
| 1968 | 17.1 °C |
| 1969 | 19.6 °C |
| 1970 | 17.8 °C |
| 1971 | 18.3 °C |
| 1972 | 18.8 °C |
| 1973 | 18.3 °C |
| 1974 | 19.1 °C |
| 1975 | 17.2 °C |
| 1976 | 18.7 °C |
| 1977 | 18.9 °C |
| 1978 | 17.8 °C |
| 1979 | 19.3 °C |
| 1980 | 18.5 °C |
| 1981 | 19.7 °C |
| 1982 | 17.9 °C |
| 1983 | 17.6 °C |
| 1984 | 18.2 °C |
| 1985 | 19.4 °C |
| 1986 | 18.8 °C |
| 1987 | 19.7 °C |
| 1989 | 20.0 °C |
| 1990 | 20.5 °C |
| 1991 | 19.0 °C |
| 1993 | 17.9 °C |
| 1998 | 18.5 °C |
| 1999 | 17.9 °C |
| 2000 | 20.2 °C |
| 2001 | 19.9 °C |
| 2002 | 19.8 °C |
| 2003 | 19.8 °C |
| 2006 | 20.2 °C |
| 2007 | 21.0 °C |
| 2010 | 18.1 °C |
What this means for you: Since 1902, Marriott-Slaterville's last spring frost has come about 1 day earlier per decade, on average. The frost-free season has grown by about 2 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Ogden Pioneer Ph (NOAA GHCN-Daily). Years with too many missing days are left out.