I'm looking for a fast growing vine, annual or perennial, to cover a trellis on our front porch. I could plant it in the ground, but would prefer to plant it in a planter on the floor. The ground already has bush and other plants that I'd rather not move. Any suggestions for zone 5. - Want to stay away from Boston Ivy and Virginia Creeper because of the difficulty repainting the railing where their little feet would attach.