When to plant sunflowers in Arizona

Sunflowers
Sow outdoors in Phoenix
Feb 15–Mar 8

Across Arizona the window opens between February 15 and June 4. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Phoenix
Feb 15–Mar 8
Last sowing for a harvest
Sep 2
Last frost, Phoenix
Jan 8

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
PhoenixFeb 15–Mar 8
TucsonFeb 15–Mar 8
GilbertFeb 15–Mar 8
ChandlerFeb 15–Mar 8
GlendaleFeb 15–Mar 8
ScottsdaleFeb 15–Mar 8
TempeFeb 15–Mar 8
GoodyearFeb 15–Mar 8
San Tan ValleyFeb 15–Mar 8
AvondaleFeb 15–Mar 8
Queen CreekFeb 15–Mar 8
MaricopaFeb 23–Mar 16
FlagstaffJun 4–Jun 25
Casas AdobesFeb 26–Mar 19
Casa GrandeFeb 15–Mar 8
Lake Havasu CityFeb 15–Mar 8
Prescott ValleyApr 30–May 21
Catalina FoothillsFeb 20–Mar 13
PrescottApr 30–May 21
Sierra VistaApr 5–Apr 26
Bullhead CityFeb 15–Mar 8
Sun CityFeb 15–Mar 8
KingmanApr 2–Apr 23
El MirageFeb 15–Mar 8
Fortuna FoothillsFeb 15–Mar 8
Drexel HeightsFeb 15–Mar 8
FlorenceFeb 15–Mar 8
Rio RicoApr 16–May 7

Questions

When should I plant sunflowers in Arizona?

In Phoenix, sow outdoors from February 15 to March 8. Across Arizona the window opens between February 15 and June 4, 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.

More for Arizona

Sunflowers in other states

Frost dates for every city in Arizona