I use a pipe bender to put three 60 degree bends in 10′ sections of steel conduit.  These nicely span my 4′ raised beds.  I mount the hoops on 2’lengths of 3/8″ rebar, pounded halfway into the earth.  The hoops are spaced at 4′ intervals, and all is covered with lengths of 10′ wide UV-blocker treated polyethylene.  The sides of the poly cover are weighted down with large rocks.

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