Well, yes, I think you have to be careful of "overwatering" too when planting in containers.
I know Clematis love water, but I'm certainly not going to watering daily or even every other day.
Right now in New Jersey the weather is cool and Days filled with sunshine are few and far
between, so I'm watching my watering carefully. I have only planted (1) Clematis thus far -
the other (5) plants will be arriving next Month. So I will have a total of (4) plants in containers
and (2) plants in the ground.
Yes, the stone urns do have drainage holes and drain quite well. I have Bamboo stakes in a Tee-pee style arrangement. I'm pleased with how the first Clematis looks.
Thank you goes out to those of you who offered me such a Warm Welcome to this Forum !