Astilbe : this perennial is a great shade plant with dense foliage + feathery, summer blooms for a shade garden. Plants grow to as much as 5 feet. There is a dwarf variety that grows about Pairs well with hydrangeas, hostas, & ferns.
Rock garden plants in stone crevices including Alpines mix, in stone wall tower (Lewisia, phlox, Sempervivum, Silene acaulis Francis Copeland' etc. growing vertically in nooks and crannies; a variety of flowering and foliage