FrostCal

When to Plant Dahlias in Vermont

In a typical Vermont location, plant outdoors May 16 – May 30. Across the state, the outdoor planting window starts as early as May 6 in Burlington and as late as May 27 in Morristown.

Method Plant out (slips, crowns, or tubers)
Days to maturity 90–120 days

Plant tubers 1-3 weeks after last frost once soil is warm (60F+); very frost-sensitive.

Dahlias Planting Dates by City

CityPlant outdoors
BurlingtonMay 6 – May 20
South BurlingtonMay 6 – May 20
ColchesterMay 9 – May 23
RutlandMay 22 – Jun 5
Essex JunctionMay 9 – May 23
HartfordMay 16 – May 30
BenningtonMay 18 – Jun 1
BarreMay 23 – Jun 6
WillistonMay 6 – May 20
MontpelierMay 12 – May 26
St JohnsburyMay 20 – Jun 3
BrattleboroMay 21 – Jun 4
WinooskiMay 6 – May 20
Saint AlbansMay 8 – May 22
Middlebury (village)May 12 – May 26
Saint JohnsburyMay 20 – Jun 3
MorristownMay 27 – Jun 10
LyndonMay 20 – Jun 3
RockinghamMay 16 – May 30
NewportMay 21 – Jun 4

Showing the 20 most populous of 20 Vermont cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Vermont cities.

Frequently Asked Questions

When should I plant dahlias in Vermont?

In a typical Vermont location, plant outdoors May 16 – May 30. Across the state, the outdoor planting window starts as early as May 6 in Burlington and as late as May 27 in Morristown.

When is the last frost in Vermont?

The average last spring frost in Vermont ranges from April 29 in Burlington to May 20 in Morristown, based on NOAA 1991–2020 climate normals.

How long do dahlias take to grow?

Dahlias typically take 90–120 days from planting to harvest. Plant tubers 1-3 weeks after last frost once soil is warm (60F+); very frost-sensitive.

Other Crops in Vermont

When to plant dahlias in other states

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