When to plant Summer squash (zucchini) in Massachusetts

In spring, from Apr 10 – June 1 in Boston to May 10 – June 10 in North Adams.

In fall, June 1 – July 15.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Summer squash planting dates by place in Massachusetts
PlaceSpringFall
Agawam TownMay 1 – 30June 1 – July 15
AmesburyMay 1 – 30June 1 – July 15
Amherst TownMay 1 – 30June 1 – July 15
AttleboroMay 1 – 30June 1 – July 15
Barnstable TownMay 1 – June 15June 1 – Aug 1
BeverlyMay 1 – 30June 1 – July 15
BostonApr 10 – June 1June 1 – Aug 10
Braintree TownMay 1 – June 15June 1 – July 20
Bridgewater TownMay 1 – 30June 1 – July 15
BrocktonMay 1 – June 15June 1 – July 20
CambridgeMay 1 – June 15June 1 – July 20
ChelseaApr 10 – June 1June 1 – Aug 10
ChicopeeMay 1 – 30June 1 – July 15
EasthamptonMay 1 – 30June 1 – July 15
EverettApr 10 – June 1June 1 – Aug 10
Fall RiverMay 1 – 30June 1 – July 15
FitchburgMay 1 – 30June 1 – July 15
FraminghamMay 1 – 30June 1 – July 15
Franklin TownMay 1 – 30June 1 – July 15
GardnerMay 1 – 30June 1 – July 15
GloucesterMay 1 – 30June 1 – July 15
GreenfieldMay 1 – 30June 1 – July 15
HaverhillMay 1 – 30June 1 – July 15
HolyokeMay 1 – 30June 1 – July 15
LawrenceApr 20 – June 1June 1 – Aug 1
LeominsterMay 1 – 30June 1 – July 15
LowellMay 1 – 30June 1 – July 15
LynnMay 1 – June 15June 1 – July 20
MaldenApr 10 – June 1June 1 – Aug 10
MarlboroughMay 1 – 30June 1 – July 15
MedfordApr 10 – June 1June 1 – Aug 10
MelroseMay 1 – June 15June 1 – July 20
MethuenApr 20 – June 1June 1 – Aug 1
New BedfordMay 1 – 30June 1 – July 15
NewburyportMay 1 – 30June 1 – July 15
NewtonMay 1 – June 15June 1 – July 20
North AdamsMay 10 – June 10June 1 – July 1
North Attleborough TownMay 1 – June 15June 1 – July 20
NorthamptonMay 1 – 30June 1 – July 15
Palmer TownMay 1 – 30June 1 – July 15
PeabodyMay 1 – June 15June 1 – July 20
PittsfieldMay 1 – 30June 1 – July 1
QuincyMay 1 – June 15June 1 – July 20
Randolph TownMay 1 – June 15June 1 – Aug 1
RevereApr 10 – June 1June 1 – Aug 10
SalemMay 1 – June 15June 1 – July 20
SomervilleApr 10 – June 1June 1 – Aug 10
Southbridge TownMay 1 – June 15June 1 – July 15
SpringfieldMay 1 – 30June 1 – July 15
TauntonMay 1 – June 15June 1 – July 20
WalthamMay 1 – 30June 1 – July 15
WatertownMay 1 – June 15June 1 – July 20
West Springfield TownMay 1 – 30June 1 – July 15
WestfieldMay 1 – 30June 1 – July 15
Weymouth TownMay 1 – June 15June 1 – July 20
Winthrop TownApr 10 – June 1June 1 – Aug 10
WoburnMay 1 – June 15June 1 – July 20
WorcesterMay 1 – June 15June 1 – July 20

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for summer squash.