I have a west facing wall, overhung by a very large bay tree. The ground is reasonably moist, it doesn't dry out entirely, but there are of course a lot of tree roots & leaf fall to contend with. I'm going to prune the bay back later in the summer and put in a climbing hydrangea petiolaris, but while it gets going, are there any climbing annuals that would do ok in that spot?
Would black-eyed susan flower there do you think? It will get 3-4 hours direct sunlight a day.