Re: Insulating
Hi Alcran, I haven't tried it as it doesn't snow here in Melbourne. I have read though that snow is a good insulator and offers protection for plants. I would presume that it works in the same way as an Igloo. Made of ice but provides some respite from the elements.
Your method would appear sound to me as the cardboard would stop the plants from frostburn while still providing the insulating effects. It will be interesting to see how your plants respond next season.
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