Plant Hardiness Zones â€“ Canada. Calgary and surrounding area falls into hardiness zone 3 with of zone 4 in sheltered areas. How closely you stick to the zone guide might be relative to how much you love the plant, you never know, a plant rated to zone 4 or 5 may thrive! Plant Hardiness Zones â€“ Gardening in Canada Please note: You are currently browsing img front yard landscape planting detail in ny traditional that is 640x480px in size. This image is listed in alberta gardening ideas category. Plant Hardiness Zones Gardening in Canada, 640x480 in 176.42 KB.