I have a fence that is in full shade once the trees fill up with leaves. And I do mean "full shade" due to a canopy from a group of trees. Almost no sun gets through during the Summer, at any time of the day. I research perennials to plant that will climb on the fence. I type "FULL SHADE", get results and then when I research, other sites say the options need partial sun. No two sites agree on ANYTHING . So I come back to the experts...what kind of climbing vine will grow in full shade in the Summer (plenty of full sun the rest of the year). I would perfer flowering, but beggers can't be choosey. TYVM