I've grown several clematis over the years,
but this one is the best bloomer so far
in our semi-arid eco-system.
I bought 4 Piilu 4" plants earlier this year, and put them in
plastic pots. Each one grew well & had multiple
blooms. They're relatively compact, growing only ~4ft,
at least the first year.
All have their "feet in the shade & tops in the sun",
which I thought was tried & true, but find now it may not
be absolutely necessary.(?)
I'll keep them in pots regardless, as I can control the growing
conditions, and move if necessary. Also, no competition from
rose roots, if pot is on a cement paver....roses roots can be
very invasive.
Also have Jackmanii & Josephine, but Piilu is
my favorite.