Has anyone used cardboard as mulch around veggies?
I have some straw, But my idea was that if I used a layer of cardboard underneath, I could use a thinner layer of straw on top and have the same affect. My concern is, that no water will penetrate the cardboard at all, and some of my more thirsty plants may end up getting too dry underneath it.
I have used newspaper and even paper flooring underlayment before, And in both cases, as long as I cover it with a different type of mulch on top, (straw, bark, etc), it decomposes within 3 to 6 weeks. But that’s long enough to smother any weeds underneath, and it stays pretty weed free after that.