Canada's Plant Hardiness Site

Ambrosia psilostachya DC.

perennial ragweed, western ragweed, naked-spike ambrosia, Cuman ragweed

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Number unique observations: 3433
Zone range (Canada): 2b - 8a

Hardiness Zones

Bioclimatic profile

name	mean	S.D.	1%	5%	10%	25%	50%	75%	90%	95%	99%	maximum	minimum
Annual Mean Temperature	14.17	5.11	2.6	5.3	6.8	9.9	15.2	18.3	20.1	20.8	22.9	24.8	0.6
Max Temperature of Warmest Period	32.64	3.27	24.6	26.2	27.7	30.4	33.6	35.3	35.9	36.2	37.6	41.9	22.8
Min Temperature of Coldest Period	-4.38	7.73	-23.37	-18.34	-14.8	-10.4	-2.5	2.1	4.6	6.3	8.4	11.3	-26.2
Annual Precipitation	732.19	281.23	268.0	350.6	390.0	488.0	725.0	915.0	1097.6	1248.4	1442.72	1590.0	108.0
Precipitation of Warmest Quarter	198.58	91.29	7.0	11.0	25.2	173.0	198.0	253.0	315.0	332.0	393.68	481.0	4.0
Precipitation of Coldest Quarter	146.46	95.7	25.0	32.0	37.0	63.0	132.0	203.0	285.0	325.8	411.0	463.0	20.0