What is the best way to adhere Spanish Moss to a circular foam ring?

I am making a seashell wreath and want to use Spanish Moss to cover the Styrofoam ring before I put the seashells on the ring. I have hot glued floral pics to the back of the shells already. Is it best to hot glue the moss or use floral pics to attach the moss? Going to be messy either way.
Thanks in advance.

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