Interior or exterior? If interior, paint or stain?
Interior paint grade fingerjoint works just fine.
Exterior, SYP or cedar,
Interior stain grade? I use mahogany or oak but clear pine or spruce
works fine too - depending what you want it to look like.
I doubt that the type of wood is as important as the finish you use to
protect it from the suns rays. SYP, as others have suggested but any
reasonably stable wood with a grain pattern you like should work just
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