'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.
‘Eco Bluebird’ Dwarf Crested Iris produces its showy lavender-blue flowers in April and May. They are displayed above the ground-hugging fans of light green blade-like leaves. Iris cristata ‘Eco Bluebird’ is very showy in spring, and less so as summer progresses because the foliage is ephemeral. The rhizomatous habit makes this delicate looking native a good seasonal groundcover for woodland settings and shady rock gardens.
'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.
PRN Preferred: One ofthe showiest japanese Irises, with very large showy flowers in June.
'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.
Copper Iris blooms in late spring, producing flat-petaled flowers of an unusual copper color. Iris fulva is very water tolerant, growing happily in locations where it is periodically standing in water. The terra cotta flowers are held above straplike green leaves. An unusual addition to rain gardens, ponds and wet meadows, Iris fulva has the additional gift of deer resistance.
'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.
‘Firebreather’ German Bearded Iris is well-named, with beautiful orange standards and falls. The large flowers make a striking show in spring and fall gardens, since Iris germanica ‘Firebreather’ is a rebloomer. Best in sunny well-drained sites.
‘Fringe of Gold’ German Bearded Iris blooms in May and June. The large showy flowers have bright white falls with wide yellow bands on the edges, and the standards are the same bright yellow. A welcome addition to the late spring garden, in sunny well-drained spots.
'Hemstitched' Bearded Iris produces large showy flowers in both late spring and fall. The blooms are white with purple ruffled borders, and white with wider borders on the standards. The combination is striking from both close up and farther away because of the tall flower spikes. Iris germanica 'Hemstitched' has the added delight of fragrant flowers.
‘Jurassic Park’ German Bearded Iris produces flowers with large yellow standards topping purple falls. Iris ‘Jurassic Park’ is a rebloomer, with a great bloom display in both late spring and early fall. Needs full sun and good drainage.
'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.
‘Violet Turner’ German Bearded Iris has large bicolor flowers, with lavender standards above dark purple falls. Iris germanica ‘Violet Turner’ is a good rebloomer, flowering in late spring and early fall. Deer resistant, salt tolerant and best in sunny well-drained sites.
'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.
Bold Pretender Louisiana Iris has flat showy flowers in early to mid summer. The petals are a combination of pink and red, with striking yellow veining coming from the center. Louisiana Irises flourish in moist and wet sites, so ‘Bold Pretender’ is an excellent addition to pond and stream margins, where it can help prevent bank erosion.
'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".
‘Cape Cod Boys’ Siberian Iris has showy periwinkle blue flowers in late spring and early summer. The ruffled petals have dark blue veins, adding contrast to the lighter blue, and centers of the flowers are a bright yellow. Siberian Irises bloom after German Irises and before Japanese Irises, making the Iris season in the garden extensive. Iris ‘Cape Cod Boys’ tolerates a wide range of soil conditions and moistures. The name ‘Cape Cod Boys’ is to make us think of the summer ocean color.
'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.
PRN Preferred: A new exciting bicolorwith large ruffled flowers.
‘Sunfisher’ Siberian Iris has bright yellow flowers in May and early June, over green strap-like foliage. ‘Sunfisher’ is the deepest yellow Siberian Iris we have seen, with soft yellow standards topping deep yellow falls. Iris sibericas are very tough and versatile, tolerating a wide range of soil types as well as being deer resistant and Black Walnut tolerant.
'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.
‘Purple Flame’ Blue Flag Iris blooms in late spring, putting out dark blue flowers over unusual foliage which starts the season with vivid purple coloration. The blade-like leaves transition to green as the weather warms up, but the combination of purple foliage and dark blue flowers in spring is really unique. Iris versicolor ‘Purple Flame’ is a chance mutation found by a gardener at the Mt Cuba Center. All Iris versicolor will grow beside or in water, so this is a great addition to stream and pond edges.