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When Is the Last Frost?
What to plant
Hardiness zones
By state
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South Dakota frost dates: I
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Ad
City
Last frost
First frost
Season
Zone
Ideal
May 1
Oct 10
162 d
5a
Interior
May 5
Oct 7
155 d
5a
Ipswich
May 8
Sep 29
144 d
4b
Irene
Apr 27
Oct 11
167 d
5a
Iroquois
May 5
Oct 4
152 d
4b
Isabel
May 10
Sep 30
143 d
4b
A
B
C
D
E
F
G
H
I
J
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L
M
N
O
P
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R
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U
V
W
Y