'Snowflake' Candytuft is a neat little evergreen perennial which is excellent for rock gardens and walkways. The small lustrous green leaves and stems are topped by showy flat white flower clumps in April and May. Iberis sempervirens 'Snowflake' has a cascading habit, so it is a good choice for mixed containers or short walls.
Flowers of this native woodland plant, Dwarf Crested Iris, are a soft delicate blue in May. They are displayed above the flat green leaves, and have a showy yellow crest. Iris cristata foliage almost disappears by mid summer.
'Cry of Rejoice' Japanese Iris has showy large flowers in June, in attractive shades of magenta red with yellow signals. The green leaves are sword-like and remain upright through the summer. All Iris ensatas tolerate average to dry soils, but really flourish is wet sites.
'Crystal Halo' Japanese Iris has large dark purple flat flowers with white edges, blooming in June. All Iris ensata varieties are wet site tolerant. They were formerly named Iris kaempferi.
'Happy Awakening' Japanese Iris blooms in June, with flat magenta-pink flowers that have dark veins and contrasting yellow centers. The excellent wet site tolerance and the deer resistance make this a great garden or bog plant.
'Loyalty' Japanese Iris has large double flowers on long stems in June. The petals are a showy deep purple with yellow stripes on the purple crests. Excellent for use in wet site, along streams and around ponds.
'Moonlight Waves' Japanese Iris blooms in June producing large flat white flowers with lime and yellow centers ('signals'). The strap-like green leaves are clean and dramatic all summer. When in bloom, Iris 'Moonlight Waves' looks like floating handkerchiefs above sword-like foliage. This is a favored plant in the famous "White Garden" of Sissinghurst in England.
'Rose Queen' Japanese Iris produces white and rose pink flowers in June in a somewhat more pendant form than most ensatas. The "falls" are white with dark pink veins and the "standards" are pink with a deep rose base. The narrow upright blades are attractive all summer. Deer resistant and wet site tolerant, 'Rose Queen' looks a little more "naturalistic" than most Iris ensatas.
'Best Bet' German Bearded Iris produces tall spikes of large flowers with blue standards and purple falls. The two toned effect is very showy, blooming first in May and June, and then reblooming in September and October. The sword-like green foliage emerges before the flower spikes, and fades by late summer. Good drainage is a must for Iris germanica cultivars.
'Superstition' Bearded Iris has such a dark purple flower that it almost looks black. The blooms are fragrant and large, making a striking addition to cut flower arrangements (even though the individual flowers each last only a day). The flowers spikes bloom above the wide straplike leaves in May and June. All German Irises perform best in dry or well drained sites. Iris germanica 'Superstition' is the darkest flowering germanica.
'War Chief' German Bearded Iris blooms in May and June, producing lots of large velvety dark red flowers. They are held above wide straplike green foliage, and are a good addition in the back of well drained perennial beds. Iris germanica 'War Chief' is a useful and fragrant cut flower, since the stems have multiple buds that open in succession.
'Butter and Sugar' Siberian Iris blooms in May, and is a striking bi-color combination of white and soft yellow. The green sword-like leaves are clean and disease resistant. All the Siberian Irises thrive in very wet sites as well as average soils. Try it beside streams, ponds and bog gardens. The long stems make 'Butter and Sugar' an excellent cut flower.
The purple blue flowers of 'Caesar's Brother' Siberian Iris appear in May. It is wet and dry site tolerant, and is the mainstay of so many perennial gardens.
PRN Preferred: This is the classic indistructable blue Iris which never needs "babysitting".
'Contrast in Styles' Siberian Iris has ruffled bi-colored petals, with white and yellow veined signals surrounded by large deep purple margins and styles. Iris siberica 'Contrast in Styles' starts blooming in late May following German Irises and preceding Japanese Irises. Siberian Irises are very tolerant of a number of soil conditions, and are particularly attractive in rain gardens and around ponds.
'Ikeda Sunbean' Japanese Roof Iris combines beautiful lavender flowers with vividly white and green striped leaves in spring. It was first introduced to the US from Japan by Barry Yinger. The longitudinally striped leaves are most striking in the spring, with very broad ivory stripes contrasting with the green stripes. The 18" lavender flowers appear above the foliage, but are taller and showier than their American relative, Iris cristata. As the summer heats up, the white fades to uniform green, but the foliage persists well into the early winter.
Slippery Slope™ Chinese Roof Iris was found in Sichuan by Darrell Probst (of Coreopsis and Epimedium fame). He introduced it because of its size and vigor, as well as the beauty of its blue purple veined flowers. The centers (signals) of the largest petals are white with dark purple veining. The green leaf blades stay clean and attractive all summer, and Iris tectorum Slippery Slope™ expands to making low growing attractive groundcover. This is an Iris that works well as a green roof plant.
'Wolong' China Roof Iris has light lavender flowers flecked with purple spots above fans of wide green strap-like leaves. The foliage is somewhat floppy but lasts all summer, unlike its North American relative Iris cristata. The flowering period is late April to June. It comes from Sichuan, China from a collection made by Jim Waddick. 'Wolong' Roof Iris won the 2010 American Iris Society's Award of Merit. Try it as a slow spreading groundcover or on a green roof that gets adequate moisture.
White Japanese Roof Iris gets its name from its presence on thatched roofs in Japan. Iris tectorum var. album has large white flowers with yellow throats, appearing in late April to early June. All the Japanese Roof Irises spread to make wide patches eventually, and do best with adequate moisture but good drainage. It is the Asian equivalent of Iris cristata 'Alba', but much bigger and not ephemeral. A hard-to-find Iris.