Anyone have a suggestion for a vine that will gracefully cover a 3' high
retainingg wall in the shade. Hopefully it will flower for some color.
Doesn't have to be a perrenial. I could even start it from seed now.

I built a wall of old semi rotted timbers (Non-PT) along my compost pile.
And although it looks good - rustic - I would like to soften the look a
little with a planting that will cling to the wall. Eventually the timbers
will rot and add to the compost. So, the plantings should be annual, not
perrenial. If it is more than one year, I'll plant again. Maybe even try
something different next year.

What do you like for shade-tolerant colorful vines in the annual family?

Robert