Last year I built a raised bed with good soil, primarily for perennials. The
bed has a double trunked maple tree, and I built a twine trellis for Morning
Glories. I've always read that if the soil is rich and moist the plant will
grow like crazy but won't bloom much. I've found that to be true.

For next year, I was thinking of burying a large ceramic pot w/ poor soil
(high clay content) at the base of the trellis. Does anyone think that's a
good idea? If not, I may just go w/ Clematis, as I think it's an ideal site
for that.

I also found that morning Glories like to climb up the vertical parts of the
trellis as opposed to the horizontal parts ( I was going for height) so next
year I'll redo it with that in mind. (is the same true for Clematis?)

Zing