When to plant sunflowers in Utah

Sunflowers
Sow outdoors in Salt Lake City
Mar 31–Apr 21

Across Utah the window opens between March 14 and June 2. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Salt Lake City
Mar 31–Apr 21
Last sowing for a harvest
Jul 17
Last frost, Salt Lake City
Mar 31

Sow outdoors up to 3 weeks after the last frost. Sow every two weeks until midsummer for flowers through fall.

Sunflowers planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
Salt Lake CityMar 31–Apr 21
West Valley CityApr 8–Apr 29
West JordanApr 18–May 9
ProvoApr 18–May 9
St. GeorgeMar 14–Apr 4
LehiApr 30–May 21
OremApr 19–May 10
SandyApr 29–May 20
OgdenApr 21–May 12
South JordanApr 18–May 9
LaytonApr 29–May 20
Eagle MountainJun 2–Jun 23
MillcreekApr 25–May 16
HerrimanApr 18–May 9
Saratoga SpringsApr 30–May 21
TaylorsvilleMar 31–Apr 21
LoganMay 8–May 29
MurrayApr 29–May 20
DraperApr 18–May 9
Spanish ForkApr 25–May 16
RivertonApr 18–May 9
BountifulApr 25–May 16
TooeleMay 2–May 23
Cedar CityMay 4–May 25
American ForkApr 17–May 8
SyracuseApr 22–May 13
RoyApr 22–May 13
Pleasant GroveApr 17–May 8
WashingtonMar 14–Apr 4
MidvaleApr 29–May 20
All 47 cities
CitySow outdoorsLast frost
Salt Lake CityMar 31 to Apr 21Mar 31
West Valley CityApr 8 to Apr 29Apr 8
West JordanApr 18 to May 9Apr 18
ProvoApr 18 to May 9Apr 18
St. GeorgeMar 14 to Apr 4Mar 14
LehiApr 30 to May 21Apr 30
OremApr 19 to May 10Apr 19
SandyApr 29 to May 20Apr 29
OgdenApr 21 to May 12Apr 21
South JordanApr 18 to May 9Apr 18
LaytonApr 29 to May 20Apr 29
Eagle MountainJun 2 to Jun 23Jun 2
MillcreekApr 25 to May 16Apr 25
HerrimanApr 18 to May 9Apr 18
Saratoga SpringsApr 30 to May 21Apr 30
TaylorsvilleMar 31 to Apr 21Mar 31
LoganMay 8 to May 29May 8
MurrayApr 29 to May 20Apr 29
DraperApr 18 to May 9Apr 18
Spanish ForkApr 25 to May 16Apr 25
RivertonApr 18 to May 9Apr 18
BountifulApr 25 to May 16Apr 25
TooeleMay 2 to May 23May 2
Cedar CityMay 4 to May 25May 4
American ForkApr 17 to May 8Apr 17
SyracuseApr 22 to May 13Apr 22
RoyApr 22 to May 13Apr 22
Pleasant GroveApr 17 to May 8Apr 17
WashingtonMar 14 to Apr 4Mar 14
MidvaleApr 29 to May 20Apr 29
SpringvilleApr 18 to May 9Apr 18
KearnsApr 8 to Apr 29Apr 8
MagnaApr 3 to Apr 24Apr 3
ClearfieldApr 29 to May 20Apr 29
KaysvilleApr 19 to May 10Apr 19
Cottonwood HeightsApr 29 to May 20Apr 29
HolladayApr 29 to May 20Apr 29
South Salt LakeMar 31 to Apr 21Mar 31
FarmingtonApr 19 to May 10Apr 19
HurricaneApr 1 to Apr 22Apr 1
West HavenApr 22 to May 13Apr 22
PaysonMay 4 to May 25May 4
ClintonApr 22 to May 13Apr 22
North Salt LakeApr 24 to May 15Apr 24
North OgdenApr 19 to May 10Apr 19
HighlandMay 3 to May 24May 3
Brigham CityMay 5 to May 26May 5

In Eagle Mountain the frost-free season is shorter than sunflowers need. Start plants indoors and pick early varieties.

Questions

When should I plant sunflowers in Utah?

In Salt Lake City, sow outdoors from March 31 to April 21. Across Utah the window opens between March 14 and June 2, depending on the local last frost.

How is this date worked out?

Sow outdoors up to 3 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

Is the season long enough for sunflowers everywhere in Utah?

Not quite. In Eagle Mountain the frost-free season is shorter than the time sunflowers need to ripen. Start plants indoors and pick an early variety.

More for Utah

Sunflowers in other states

Frost dates for every city in Utah