Is this what you mean: https://www.hometalk.com/29651024/pool-noodle-stone-column?expand_all_questions=1?
Hi there Patricia,
Tape them together to form the shape you require. Add a disk or two to the top and bottom and finish of a larger square or two on top then paint for the right effect.. ( Stone or Marble or decorate with faux Ivy draped around them.) Hope that helps.
Hi Patricia. I'm Cindy. I believe TR gave you the DIY you asked about. I would like to suggest an alternative that I made this summer. I found 2 sets of short shutters at Habitat for Humanity. I cleaned them and attached the 2 sets together using L brackets. Once I had them in the shape of a square, I put more L brackets 6 inches down inside the square and placed a piece of wood on top of them. Then I applied 2 coats of white spray paint that I had on hand. I placed a potted plant right on the piece of wood. It looks great. I put it next to my front door. When I saw your question I wanted to share my column with you.
Hi Patricia, I found the hometalk version for you, hope it helps
Here's a post that might help - https://www.hometalk.com/29651024/pool-noodle-stone-column?expand_all_questions=1
In addition to what JohnVallance said, you may want to get some Texture Additives for your paint to give it that coarse stony look.