We put up a row of fencing for them to grow up. They quickly became a mass of vines and grew up the fence and then along the ground.
Then they started to grow up the side of the building beside the garden.
This is the largest of the loofah gourds. With all of the vines I expect a few small ones may be hidden away. This one gourd is enough to make us want to grow loofahs again next year!