Canada's Plant Hardiness Site

Asclepias hirtella (Pennell) Woodson

prairie milkweed, stiff-haired milkweed, tall green milkweed

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Data Details

Number unique observations: 872
Zone range (Canada): 6b - 7b

p 1971-2000

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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	0
6b	1
7a	1
7b	1
8a	0
8b	0
9a	0
Outside Canada	99

USDA Zones
Zone	%
1	0
2	0
3	0
4	1
5	9
6	33
7	27
8	25
9	2
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	13.05	3.28	6.6	7.6	8.81	10.9	12.9	15.0	17.7	19.5	20.9	21.1	6.5
Max Temperature of Warmest Period	31.76	1.96	27.47	28.2	28.71	30.5	32.1	33.2	34.1	34.5	35.3	36.2	26.5
Min Temperature of Coldest Period	-6.56	4.94	-16.9	-14.04	-11.8	-9.4	-7.3	-3.8	0.99	3.34	6.43	7.3	-17.6
Annual Precipitation	1113.45	182.41	791.71	855.55	889.2	969.0	1091.5	1216.0	1401.9	1453.45	1560.29	1614.0	783.0
Precipitation of Warmest Quarter	299.34	28.58	238.0	249.0	261.0	283.0	297.5	319.0	333.0	349.45	375.0	391.0	214.0
Precipitation of Coldest Quarter	213.18	94.5	79.71	91.55	111.1	146.0	184.0	269.25	374.0	409.45	441.29	452.0	76.0