Grape arbor with new planting

Hi all…

I have a cement patio area that is about 20x20 at the rear of the house.

I want to build an arbor over it and to plant eating grapes around the edges to grow up and over.

Planting the grapes in the ground around the edges is impracticalble.

I was planning on planting the grapes in large half-barrel planters.

So …

  1. Is my idea for the planters practical and workable and if so…

  2. What type of growing media do I need to use?

  3. Any suggestions for improvements to my plans?

Thanx in advance for any assistance or suggestions.