I used cut up lenths of soaker hose, as it's easy to clean and textured and can be cut to any length you need, stretched taught or let droop a bit, for a more natural look. It's easy to find and comes in black. You can insert the stems of faux foliage through and in it, to make it look even more natural.
I also liked the member's suggestion ( don't recall who ), to use an undecorated wreath of grapevine, from a craft shop, soak it in hot water overnight to loosen the vines and unravel to form a nice assortment of vines of different thicknesses.