+20 Raised Garden Bed Bottom Material References. You need a weed barrier newspapers. An increased risk of fire, a decrease in the availability of soil, a need for more care when watering,.

Hands down, the best material to put under your raised garden bed is landscape fabric. Depending on the size of your bed, cedar or redwood could cost up to $150 per bed; Hold landscape fabric on the bottom of your raised garden bed with staples.