Wooden posts are fine. I built a pergola with 4" treated fence posts concreted into a lawn about 15 years ago. I soaked the posts in wood preserver and gave them two coats of fence treatment.
It's still holding up ok and the posts are fine.
Concrete is heavy, will look crap, be awkward to replace if one gets damaged (concrete posts can crack and spall) and will cost more money overall.
Those metal shoe things are the answer, build a skirt around the base, treated softwood will last up to 10 years and can easily be replaced. Use oak and it should last forever.
Or build a mock brick plinth under it.
Strategically place some pots around them if they're so offensive. You can then grow something up it/them as well.
Pair of these back to back might fit?
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As said a few posts back, I plan to build a single skin wall on a shallow footing a couple blocks high between the posts to make a boundary for the patio, but I don't think the wall will be substantial enough to bolt the posts to, so they would need to go to the ground.
This is what I might do in the end, although making the forms and pouring the plinths would be a bit more work, but then I can also choose the shape. I just wondered if anyone had done it using concrete posts, and if it worked out OK.
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