I have well established perennial garden which is part shade or high dappled shade. I grow a number of perennials . Lets just say I have few spots where roses will thrive.
Over the years some martagons, asiatic lilies and tiger lilies seems remained perennials but oriental and trumpets are not, give me show for year or two and disappear.
Besides shade factor and I mean high pruned dappled shade, what else I might be not considering?
My soil pH usually runs 6.5 or 7. I have full lush gardens but partial sun at best .
I really love trumpets, oriental and OT lilies.
Any suggestions on varieties? Specifics I might be
missing ? Growing in pots?