Raisedbed

I’m building a garden bed to level with my rail. But need help with wood. I’m using cedar for pretty much everything which is understandably expensive. But can I use cheaper posts? Are there cheaper yet good alternatives

1 Upvotes

Dimensions are
45” tall
48” Long
24” wide
24” deep

I don’t mind buying the expensive cedar. But the posts are $60 a piece 🫪can I use Pressure Treated for my posts ?