FrostCal

When to Plant Zucchini in Arizona

In a typical Arizona location, start seeds indoors Jan 23 – Jan 30, then sow outdoors Feb 20 – Mar 6, then transplant outdoors Feb 20 – Feb 27. Across the state, the outdoor planting window starts as early as Jan 11 in Bullhead City and as late as Jun 11 in Flagstaff. 3 cities in Arizona are essentially frost-free and can plant on a year-round schedule.

Method Direct sow
Days to maturity 45–55 days

Fast-growing squash; direct sow 1-3 weeks after last frost, or start indoors 2-3 weeks early for a head start.

Zucchini Planting Dates by City

CityStart indoorsDirect sowTransplant
PhoenixDec 15 – Dec 22Jan 12 – Jan 26Jan 12 – Jan 19
TucsonDec 30 – Jan 6Jan 27 – Feb 10Jan 27 – Feb 3
MesaJan 23 – Jan 30Feb 20 – Mar 6Feb 20 – Feb 27
ChandlerJan 23 – Jan 30Feb 20 – Mar 6Feb 20 – Feb 27
GilbertJan 23 – Jan 30Feb 20 – Mar 6Feb 20 – Feb 27
GlendaleDec 30 – Jan 6Jan 27 – Feb 10Jan 27 – Feb 3
ScottsdaleJan 23 – Jan 30Feb 20 – Mar 6Feb 20 – Feb 27
PeoriaDec 30 – Jan 6Jan 27 – Feb 10Jan 27 – Feb 3
TempeJan 23 – Jan 30Feb 20 – Mar 6Feb 20 – Feb 27
Tempe JunctionJan 23 – Jan 30Feb 20 – Mar 6Feb 20 – Feb 27
SurpriseDec 30 – Jan 6Jan 27 – Feb 10Jan 27 – Feb 3
YumaDec 18 – Dec 25Jan 15 – Jan 29Jan 15 – Jan 22
San Tan ValleyJan 11 – Jan 18Feb 8 – Feb 22Feb 8 – Feb 15
AvondaleDec 17 – Dec 24Jan 14 – Jan 28Jan 14 – Jan 21
GoodyearDec 17 – Dec 24Jan 14 – Jan 28Jan 14 – Jan 21
FlagstaffMay 14 – May 21Jun 11 – Jun 25Jun 11 – Jun 18
Casas AdobesFeb 5 – Feb 12Mar 5 – Mar 19Mar 5 – Mar 12
Lake Havasu CityDec 15 – Dec 22Jan 12 – Jan 26Jan 12 – Jan 19
Casa GrandeJan 15 – Jan 22Feb 12 – Feb 26Feb 12 – Feb 19
BuckeyeDec 17 – Dec 24Jan 14 – Jan 28Jan 14 – Jan 21
Catalina FoothillsJan 30 – Feb 6Feb 27 – Mar 13Feb 27 – Mar 6
MaricopaFeb 2 – Feb 9Mar 2 – Mar 16Mar 2 – Mar 9
Oro ValleyMar 12 – Mar 19Apr 9 – Apr 23Apr 9 – Apr 16
Sierra VistaMar 15 – Mar 22Apr 12 – Apr 26Apr 12 – Apr 19
Prescott ValleyMar 30 – Apr 6Apr 27 – May 11Apr 27 – May 4
PrescottApr 9 – Apr 16May 7 – May 21May 7 – May 14
MaranaFeb 2 – Feb 9Mar 2 – Mar 16Mar 2 – Mar 9
Bullhead CityDec 14 – Dec 21Jan 11 – Jan 25Jan 11 – Jan 18
Apache JunctionJan 21 – Jan 28Feb 18 – Mar 4Feb 18 – Feb 25
Sun CityDec 30 – Jan 6Jan 27 – Feb 10Jan 27 – Feb 3

Showing the 30 most populous of 72 Arizona cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Arizona cities.

Frequently Asked Questions

When should I plant zucchini in Arizona?

In a typical Arizona location, start seeds indoors Jan 23 – Jan 30, then sow outdoors Feb 20 – Mar 6, then transplant outdoors Feb 20 – Feb 27. Across the state, the outdoor planting window starts as early as Jan 11 in Bullhead City and as late as Jun 11 in Flagstaff. 3 cities in Arizona are essentially frost-free and can plant on a year-round schedule.

When is the last frost in Arizona?

The average last spring frost in Arizona ranges from January 4 in Bullhead City to June 4 in Flagstaff, based on NOAA 1991–2020 climate normals.

How long do zucchini take to grow?

Zucchini typically take 45–55 days from planting to harvest. Fast-growing squash; direct sow 1-3 weeks after last frost, or start indoors 2-3 weeks early for a head start.

Other Crops in Arizona

When to plant zucchini in other states

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