Before Christmas, some of our new Tree Champions and helpers met to water and add scrap cardboard mulch to our trees before the holidays. Lovely festive jumpers and great team work.
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What a good idea – it’s a resource schools are never short of! How often do you need to top the cardboard up?
I’m not sure about topping up as we just started doing it. I guess when it has rotted away or the weeds start growing through. We also use cardboard in our raised beds to put carbon back in the soil over winter – works well!