I live in the Toronto (East York area) and I am looking into trying to extend my winter garden through the winter months. I have a couple of raised beds that will hold some of the more hardy vegetables (spinach, lettuce, carrots, broccoli, beets, etc). I am wondering if you can suggest a good quality winterize covering (plastic) and where I can purchase, that would be good to use that will not only provide adequate protection but also provide good natural sunlight?
Good for you to extend the season! You will want to purchase 3 to 6 millimetre thick plastic sheeting, which is widely available at hardware and big box stores.
To help you get started, here are links to a couple of articles on assembling mini-hoop tunnels for this purpose; one from Mother Earth News here and the other, an excerpt from Canadian author Nikki Jabbour’s book The Year Round Vegetable Gardener. Nikki recently lectured at the Toronto Botanical Garden, where she inspired both experienced and beginner vegetable gardeners.
Good luck and enjoy those winter salads!