Review Of Douglas Fir Garden Bed References. The wood lasts for about 4 to 7. Douglas fir for raised beds hold up well for three to six years when in direct contact with the ground.
True firs, unlike douglas fir, are grown in usda plant hardiness zones 4 to 6,. I am planning to buy two 4 x 12 x 16' timbers for a raised garden and am trying to decide between cedar and douglas fir. I know the wood will rot, but i dont mind swapping out the.
