Canada's Plant Hardiness Site
Asclepias quadrifolia
Jacq.
whorled milkweed, fourleaf milkweed
Synonymy
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Map for gardeners - (Based on temperature variables only)
Current distribution map - (Based on temperature and precipitation variables)
ssp126 2011-2040
ssp126 2041-2070
ssp126 2071-2100
ssp245 2011-2040
ssp245 2041-2070
ssp245 2071-2100
ssp585 2011-2040
ssp585 2041-2070
ssp585 2071-2100
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ANUCLIM
Maxent
Data Details
Number unique observations: 1438 Zone range (Canada): 6a - 7b
Draw
p 1971-2000
Download Grid Data
Hardiness Zones
Canadian Plant Hardiness Zones
Zone
%
0a
0
0b
0
1a
0
1b
0
2a
0
2b
0
3a
0
3b
0
4a
0
4b
0
5a
0
5b
0
6a
1
6b
1
7a
1
7b
1
8a
0
8b
0
9a
0
Outside Canada
97
USDA Zones
Zone
%
1
0
2
0
3
0
4
1
5
7
6
45
7
37
8
8
9
0
10
0
11
0
12
0
13
0
Bioclimatic profile
name
mean
S.D.
1%
5%
10%
25%
50%
75%
90%
95%
99%
maximum
minimum
Annual Mean Temperature
11.91
2.22
6.8
7.8
8.8
10.4
12.2
13.5
14.8
15.4
16.1
17.4
5.8
Max Temperature of Warmest Period
30.37
2.06
25.74
26.9
27.7
28.8
30.4
32.1
33.0
33.6
34.4
35.1
24.1
Min Temperature of Coldest Period
-6.89
2.77
-14.5
-12.0
-10.7
-8.3
-6.85
-4.8
-3.37
-2.7
-1.8
0.4
-15.2
Annual Precipitation
1174.2
162.17
916.37
950.85
980.0
1046.0
1156.0
1271.75
1408.0
1488.0
1601.89
1724.0
832.0
Precipitation of Warmest Quarter
302.21
29.14
241.0
256.85
271.0
283.0
299.0
320.0
338.0
352.0
386.26
405.0
214.0
Precipitation of Coldest Quarter
257.02
72.64
119.74
150.85
174.7
207.0
247.0
292.0
358.0
408.15
447.78
483.0
94.0
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