Canada's Plant Hardiness Site

Asclepias exaltata L.

poke milkweed, fourleaved milkweed, tall milkweed

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Data Details

Number unique observations: 2059
Zone range (Canada): 4a - 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	1
4b	3
5a	2
5b	2
6a	1
6b	1
7a	1
7b	1
8a	0
8b	0
9a	0
Outside Canada	86

USDA Zones
Zone	%
1	0
2	0
3	1
4	16
5	28
6	39
7	14
8	1
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	8.7	2.32	4.0	4.9	5.88	7.1	8.5	10.2	12.1	12.9	14.0	15.8	3.6
Max Temperature of Warmest Period	28.1	1.51	24.76	25.79	26.3	27.0	28.1	28.9	30.0	30.9	32.14	32.6	23.5
Min Temperature of Coldest Period	-11.23	4.44	-21.7	-19.6	-17.6	-14.5	-10.3	-8.1	-5.7	-4.89	-3.16	-1.0	-23.0
Annual Precipitation	1040.68	217.0	689.32	770.9	797.8	853.0	1011.0	1196.0	1310.0	1395.1	1685.84	1777.0	588.0
Precipitation of Warmest Quarter	308.96	35.52	226.0	245.0	258.0	287.0	313.0	332.0	348.0	362.0	401.84	429.0	208.0
Precipitation of Coldest Quarter	202.2	94.31	56.0	69.9	80.0	121.0	207.0	270.0	311.0	346.1	462.42	491.0	46.0