Canada's Plant Hardiness Site

Achillea ptarmica L.

sneezeweed yarrow, white tansy, sneezewort, pearl yarrow

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Data Details

Number unique observations: 678
Zone range (Canada): 1b - 7b

p 1971-2000

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Hardiness Zones

Canadian Plant Hardiness Zones
Zone	%
0a	0
0b	0
1a	0
1b	1
2a	1
2b	11
3a	14
3b	8
4a	5
4b	5
5a	3
5b	3
6a	2
6b	1
7a	1
7b	1
8a	0
8b	0
9a	0
Outside Canada	44

USDA Zones
Zone	%
1	0
2	1
3	33
4	21
5	22
6	20
7	1
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	5.0	2.32	0.6	1.28	1.97	3.5	4.9	6.2	7.9	9.6	11.42	12.5	-0.9
Max Temperature of Warmest Period	25.41	1.85	20.25	22.7	23.37	24.3	25.4	26.6	27.9	28.7	29.8	31.0	18.7
Min Temperature of Coldest Period	-16.66	4.52	-26.02	-25.0	-23.0	-19.3	-16.8	-13.3	-11.07	-9.0	-6.65	-5.0	-27.9
Annual Precipitation	998.02	218.72	427.16	581.75	733.5	841.0	1021.5	1156.0	1234.3	1302.15	1501.37	1696.0	410.0
Precipitation of Warmest Quarter	288.4	40.08	193.77	229.85	242.0	261.0	287.0	316.0	343.0	355.15	373.61	403.0	136.0
Precipitation of Coldest Quarter	210.14	85.45	51.54	63.0	77.7	152.0	219.0	274.0	305.0	331.6	415.61	482.0	38.0