Hey,
We are working on making two 3'x12' planters with a dog-proof 6' tall trellace/wall around a total area of 8'x12'. We are currently wondering what wood to use that's a good combination of durability and price. Right now we are kicking around using plastic wood, redwood, or cedar. We want this thing to last at least 10 years in a fairly warm, dry So Cal climate. The lower area has to hold up 2' of dirt above ground, and then posts are going to support trellaces and a shade covering it. Mostly we're worried about what wood to use to hold back the dirt and for the posts since they are the most susceptible to rot. What are your suggestions for this?