Echinops ritro 'Veitch's Blue' - A wonderfully spiky tall summer flowering perennial, with blue spherical blooms, resembling a mace in form. Best grown on loose soil in full sun, and a wonderful cut flower. Height: 140cm Drought resistance: medium Flowering time: spring Frost tolerance: extremely good Light requirement: full sun
Russian sage, Perovskia atriplicifolia, 3-5 feet tall, lavender or blue flowers and silvery foliage, aromatic leaves are oblong, deeply cut along the edges. Foot-long panicles of flowers bloom for many weeks. Excellent drainage and full sun are ideal, very light shade is tolerated. Plant close to avoid staking since the tall plants tend to flop. Good for back of flower bed. Zones 4-9.
Bergenia 'Morgenrote'. Morning red. Clump forming perennial with broadly obovate, deep green leaves, 13-15cm long. Bright reddish pink flowers are borne on red stems in mid-and late spring; repeats flowers in cool summers. Fully hardy to frost hardy. Grow in humus rich mbwd soil in full sun or partial shade.
Evergreen Candytuft (Iberis sempervirens) Small clusters of delicate white flowers appear in low-growing clumps in spring, and continue into the fall. The shiny, dark-green leaves stay on all winter, so the plant remains attractive year-round. Requires full sun to part shade; regular water.
Veronica - so many different uses in the landscape. At home in the rock garden, between flagstones in the patio or as a slow growing but long-lived ground cover in the xeric garden, this little plant always looks good. The tiny dark green leaves disguise it, looking like another creeping thyme; but when it comes into bloom, it's covered with hundreds of small azure blue flowers.