Planta Backyard and Commercial Greenhouse Kits for Sale, Canada and US – Planta Greenhouses Planta Greenhouses offers Backyard and Commercial, Heavy Duty, Greenhouses for sale. Most greenhouses can withstand over 6 ft of snow, and winds over 100km/h. With a 10 year warranty, you can see why we are Canada's favorite greenhouse. Shipping to ON, QC, NB, NS, NF, MB, SK, AB and BC. Buy your greenhouse today!