Morning Glories and Moonflower

I planted both white and blue morning glories along the wooden fence on the western end of the garden where I had Carter clean out the weeds. I'm hoping they grow "naturally" and smother out the weeds. The strip of dirt is only about 6 inches wide, so there is not much else that will grow there except weeds. I planted the moon flowers in a similar strip of dirt behind the garage that is too narrow for anything except a wild vine.