Can I use a ShelterLogic GrowIT greenhouse year-round in Canada?

ShelterLogic GrowIT greenhouses are designed to extend your Canadian growing season:

• Spring start: Start seedlings 4-6 weeks earlier than outdoors
• Fall extension: Protect crops 4-8 weeks past first frost
• Winter: The polyethylene cover provides frost protection to about -5°C. For deep-winter growing, you'd need supplemental heating

The UV-treated polyethylene cover creates a greenhouse effect that raises interior temperature 10-15°C above outside. For Canadian zones 3-5, expect usable growing from March through November with a GrowIT greenhouse.