Against a 4' wooden fence facing West, but shaded some due to an Oak tree nearby and 4 pine trees on the other side? The fence runs about 50 feet. It gets late afternoon sun only.

I have planted them without a support in full sun and they have done beautifully but look more like a bush. I have been trying to think of some type of vine to plant next to the fence, then thought of the moonflower as I have many seeds and like the flowers. Any help would be greatly appreciated.