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When Is the Last Frost?
What to plant
Hardiness zones
By state
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North Dakota frost dates: U
A
B
C
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U
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Ad
City
Last frost
First frost
Season
Zone
Underwood
May 10
Sep 29
142 d
4a
Upham
May 15
Sep 25
133 d
3b
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
R
S
T
U
V
W
Y
Z