FrostCal

When to Plant Zucchini in Maryland

In a typical Maryland location, start seeds indoors Mar 13 – Mar 20, then sow outdoors Apr 10 – Apr 24, then transplant outdoors Apr 10 – Apr 17. Across the state, the outdoor planting window starts as early as Mar 29 in California and as late as May 1 in Westminster.

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
BaltimoreMar 3 – Mar 10Mar 31 – Apr 14Mar 31 – Apr 7
ColumbiaMar 20 – Mar 27Apr 17 – May 1Apr 17 – Apr 24
GermantownMar 24 – Mar 31Apr 21 – May 5Apr 21 – Apr 28
Silver SpringMar 20 – Mar 27Apr 17 – May 1Apr 17 – Apr 24
FrederickMar 12 – Mar 19Apr 9 – Apr 23Apr 9 – Apr 16
WaldorfMar 13 – Mar 20Apr 10 – Apr 24Apr 10 – Apr 17
Glen BurnieMar 20 – Mar 27Apr 17 – May 1Apr 17 – Apr 24
GaithersburgMar 11 – Mar 18Apr 8 – Apr 22Apr 8 – Apr 15
RockvilleMar 11 – Mar 18Apr 8 – Apr 22Apr 8 – Apr 15
Ellicott CityMar 20 – Mar 27Apr 17 – May 1Apr 17 – Apr 24
DundalkMar 3 – Mar 10Mar 31 – Apr 14Mar 31 – Apr 7
BethesdaMar 19 – Mar 26Apr 16 – Apr 30Apr 16 – Apr 23
BowieApr 1 – Apr 8Apr 29 – May 13Apr 29 – May 6
TowsonMar 12 – Mar 19Apr 9 – Apr 23Apr 9 – Apr 16
Aspen HillMar 11 – Mar 18Apr 8 – Apr 22Apr 8 – Apr 15
WheatonMar 11 – Mar 18Apr 8 – Apr 22Apr 8 – Apr 15
Bel Air SouthMar 20 – Mar 27Apr 17 – May 1Apr 17 – Apr 24
Gwynn OakMar 12 – Mar 19Apr 9 – Apr 23Apr 9 – Apr 16
PotomacMar 11 – Mar 18Apr 8 – Apr 22Apr 8 – Apr 15
SevernMar 20 – Mar 27Apr 17 – May 1Apr 17 – Apr 24
North BethesdaMar 11 – Mar 18Apr 8 – Apr 22Apr 8 – Apr 15
CatonsvilleMar 3 – Mar 10Mar 31 – Apr 14Mar 31 – Apr 7
AnnapolisMar 6 – Mar 13Apr 3 – Apr 17Apr 3 – Apr 10
HagerstownMar 21 – Mar 28Apr 18 – May 2Apr 18 – Apr 25
EssexMar 3 – Mar 10Mar 31 – Apr 14Mar 31 – Apr 7
HanoverMar 20 – Mar 27Apr 17 – May 1Apr 17 – Apr 24
WoodlawnMar 12 – Mar 19Apr 9 – Apr 23Apr 9 – Apr 16
Severna ParkMar 6 – Mar 13Apr 3 – Apr 17Apr 3 – Apr 10
OdentonMar 20 – Mar 27Apr 17 – May 1Apr 17 – Apr 24
Saint CharlesMar 13 – Mar 20Apr 10 – Apr 24Apr 10 – Apr 17

Showing the 30 most populous of 151 Maryland cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Maryland cities.

Frequently Asked Questions

When should I plant zucchini in Maryland?

In a typical Maryland location, start seeds indoors Mar 13 – Mar 20, then sow outdoors Apr 10 – Apr 24, then transplant outdoors Apr 10 – Apr 17. Across the state, the outdoor planting window starts as early as Mar 29 in California and as late as May 1 in Westminster.

When is the last frost in Maryland?

The average last spring frost in Maryland ranges from March 22 in California to April 24 in Westminster, 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 Maryland

When to plant zucchini in other states

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