How wet is "very wet"? Hydrangeas like moist soil but well-drained moist soil so if the area is overly saturated with water (digging a hole result in water accumulating at the base) and can become so again with another heavy rain, I'd look for another location. And I would grow on the climber for awhile before planting in its permanent home. Just like a regular climbing hydrangea, Schizophragma takes a few years to establish and planting a larger, better developed plant just puts you a bit ahead.

Too wet and oakleafs will droop continuously. Even if they don't die, it will hinder growth. You can test them out in the desired area, but I'd recommend elevating the crown about 1-2" above the soil line and making a small mound of mulch around the base so that additional water is shed and the plant does not drown.

And where is Gatsby Moon on sale, might I ask?

Thank you both! I was planning on mounding before I planted them. The area isn't constantly wet, but it gets over saturated during heavy rains and can have standing water in the spring particularly.

I ordered from Bluestone Perennials ;) Not sure if they are sold out yet or not.

I may have to reexamine where I place them. They weren't expensive so, I may just give it a shot and hope they get established before next year. Part of the issue is that the area had 50 year old shrubs removed 4 years ago and lost two trees, so there is not much left to drink the water that collects.