Canada's Plant Hardiness Site

Althaea officinalis L.

common marsh mallow, white mallow, marsh mallow root, European marsh mallow

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Data Details

Number unique observations: 226
Zone range (Canada): 3b - 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	1
4a	2
4b	4
5a	3
5b	3
6a	1
6b	1
7a	1
7b	1
8a	0
8b	0
9a	0
Outside Canada	81

USDA Zones
Zone	%
1	0
2	0
3	1
4	16
5	25
6	40
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	8.21	2.89	2.52	3.9	4.6	5.9	8.1	10.3	12.0	13.2	15.35	16.2	2.4
Max Temperature of Warmest Period	27.8	2.08	23.0	24.72	25.3	26.5	27.85	29.1	30.9	31.5	32.58	33.5	22.0
Min Temperature of Coldest Period	-11.87	4.67	-20.08	-18.98	-18.0	-16.3	-11.2	-8.32	-6.0	-4.85	-1.48	-0.3	-21.1
Annual Precipitation	1040.14	140.33	783.5	811.75	852.0	942.0	1025.0	1159.75	1221.0	1264.5	1326.75	1408.0	752.0
Precipitation of Warmest Quarter	296.21	33.94	225.0	237.0	247.5	276.0	296.0	322.25	342.0	346.75	364.75	372.0	217.0
Precipitation of Coldest Quarter	218.77	57.42	72.5	100.75	155.5	191.0	216.0	260.0	284.5	311.75	328.0	367.0	58.0