Just came across this thread and thought I would share something I am going to try for my garden to support a trellis. I haven't tried it yet but it might just work. Basically I am going to create concrete bases for posts by sinking them in concrete in a plastic cat litter bucket. That way I will end up with a post that had a nice heavy concrete 'foot' (same principle as a patio umbrella stand but much cheaper.
I have reason to believe it will work because the post-in cat-litter-bucket more-or-less works for me already if I fill it with rocks and this would be an improvement on that.
Use the lid of the cat litter bucket to hold the post in place while the concrete sets. No real need to remove the plastic bucket if you have enough of them (which I do).
Just an idea.
The approach above from @B-Goock sounds way more professional but would be beyond my skills.
Good luck!
I have reason to believe it will work because the post-in cat-litter-bucket more-or-less works for me already if I fill it with rocks and this would be an improvement on that.
Use the lid of the cat litter bucket to hold the post in place while the concrete sets. No real need to remove the plastic bucket if you have enough of them (which I do).
Just an idea.
The approach above from @B-Goock sounds way more professional but would be beyond my skills.
Good luck!