I plant 12 sunflower seedlings out today. To help support them in their youth, I put a 12" wide 24" tall vinyl 2"x3" fencing cylinder on the spot held down with two 24" rebars pounded down for support. Put in 3 cylinders of 4 sunflowers each. Given some floppiness of previous plantings, I attached them loosely to the wire cylinders with 1" wide garden clips.
And I have more clips attached to the top of the wires cylinders for when they reach that high. After that, they are on their own, but should do fine. We get some oddly strong winds here. Supported at 2' high, they do a lot better than having none.
