This is a design for parts to a small trellis that is intended to fit into a pot. I am using this to support green pea plant.

The design uses 5/16 inch dowel rods that fit into an English Garden style top. There is also a file that contain parts for feet -- I chose not to have the wood in direct contact with the soil. These are optional.

My trellis is about 24 inches tall and the legs of the trellis actually bend slightly to fit into the pot, which I think adds to the look.