Regions / Mid-Atlantic
Selecting plants suited to the Mid-Atlantic climate will be a key step to success.
Various initiatives have taken place to determine how well plants would withstand the cold winter temperatures (Plant Hardiness Zones) or when plants would start suffering from the heat (Plant Heat Zones).
The Mid-Atlantic region lies in USDA Plant Hardiness Zones 5 through 7 and in AHS Heat Zones 3 through 6. Stretching over a long expanse of territory, the Mid-Atlantic states are home to a wide range of weather and climate. However, generally speaking, this region enjoys 4 distinct seasons characterized by mild springs, hot and humid summers along the coast, but cooler in the mountains, mild falls, and chilly winters with some snow.
Allium oreophilum (Pink Lily Leek) is a compact, hardy bulb with delicate, loose umbels of rosy reddish-pink, star-shaped flowers adorned with darker midveins. The blossoms are mounted on wiry gray-mauve stems and rise above narrow, semi-erect, gray-green leaves.
Blooming about two weeks earlier than the other large Alliums, Allium rosenbachianum (Showy Persian Onion) is a bulbous perennial with large, rounded umbels, 4 in. across (10 cm), packed with up to 50 deep-purple, star-shaped flowers adorned with prominent, white stamens.
Reminiscent of swirling eddies of water, Allium senescens 'Blue Eddy' is a bulbous perennial forming a very compact clump of elegantly swirling, blue-gray to gray-green leaves. In late summer to early fall, profuse, rounded umbels, 1.5 in. across (4 cm), tightly packed with pale lilac pink flowers are borne atop leafless stems just above the attractive foliage. The flowers are both long lasting and excellent as cut flowers. A charming addition to the rock or herb gardens.
Allium senescens (German Garlic) is a bulbous herbaceous perennial which forms a tuft of twisted, grassy-looking, green leaves and produces up to 30 fragrant round balls of soft pink-lilac flowers atop upright stems in mid to late summer. Lasting for several weeks, they attract butterflies and hummingbirds.
One of the tallest white Alliums, Allium 'White Giant' features huge globes, 6-8 in. wide (15-20 cm), densely packed with hundreds of snow-white flowers adorned with emerald green eyes. They are borne atop sturdy, upright stems and rise above the foliage of upright, strap-shaped, glossy green leaves.
Allium Unifolium (Oneleaf Onion) is a compact perennial with delicate clusters of up to 30 fairly large, star-shaped, satiny, rose-pink flowers. The blossoms are borne atop the foliage of short gray-green basal leaves. Blooming in late spring to early summer, this charming Allium spreads freely in the garden without being a pest.
More tolerant of part shade conditions than most Aliums, Allium ursinum (Wild Garlic) is a vigorous, bulbous perennial with loose umbels, 2 in. across (5 cm), counting up to 20 star-shaped white flowers. The blossoms are borne on erect, leafless stems and rise above pairs of elliptic, linear, deep green basal leaves. If bruised or crushed, the foliage exudes a strong onion or garlic aroma.
Alliums are plants of exquisite beauty that deserve a place in perennial gardens. Easy to grow and undemanding, these very ornamental bulbs distinguish themselves by their great diversity in color, inflorescence, flowering height and bloom times. Many species bloom in early summer - just after the spring-flowering period and just before the exuberant full bloom of summer.
Impressive, Alocasia 'Portora' (Elephant Ear) is a tender perennial boasting enormous ruffled green leaves borne on strong purple stems. They are arrow-shaped at their bases and stand upright, pointing skyward, unlike the leaves of Colocasia which droop and point toward the ground. They can reach up to 4-5 ft. (120-150 cm) in good growing conditions.
Alstroemeria 'Bali' (Peruvian Lily) is a densely branched, tuberous perennial with lance-shaped, dark green leaves and a profusion of golden-apricot flowers from early summer to fall. Long-lasting, the blossoms are adorned with red splashes and mahogany streaks.
Ideal to brighten up the garden, Alstroemeria 'Butterscotch' (Peruvian Lily) is a tall, vigorous perennial which produces a profusion of soft pinkish apricot flowers, adorned with yellow throats and dark burgundy streaks. Blooming from early summer to early fall, the eye-catching blossoms rise atop sturdy stems clad with lance-shaped, fresh green leaves.
Incredibly striking, Alstroemeria 'Cleo' (Peruvian Lily) is a densely branched, tuberous perennial with lance-shaped, dark green leaves and a profusion of rich purple flowers from early summer to fall. Long-lasting, the blossoms are adorned with pale yellow throats and mahogany streaks.
Spice up your garden or patio with the spectacular blossoms of Alstroemeria 'Flaming Star' (Peruvian Lily). Free-flowering, this exuberant and vigorous perennial features brilliant orange funnel-shaped flowers that are ideal to brighten up the garden.
Hardier than most, Alstroemeria 'Inca Ice' (Peruvian Lily) is a tuberous perennial with lance-shaped, dark green leaves and a profusion of long-lasting, large, funnel-shaped flowers with soft apricot pink and creamy yellow petals, adorned with burgundy streaks. Blooming from early to late summer, this Peruvian Lily is quite vigorous and produces loads of flowers over a long period.
Hardy, Alstroemeria 'Inca Joli' (Peruvian Lily) is a tuberous perennial with lance-shaped, dark green leaves and a profusion of long-lasting, large, funnel-shaped, fiery orange-red flowers, adorned with golden throats and burgundy streaks. Blooming from late spring to late summer, this Peruvian Lily is quite vigorous and produces loads of flowers over a long period.
Exotic looking, Alstroemeria 'Indian Summer' (Peruvian Lily) is a vigorous perennial with coppery-orange and golden-yellow flowers that are ideal to brighten up the garden. Adorned with dark burgundy streaks, the eye-catching flowers bloom profusely for weeks above a handsome foliage of lance-shaped, rich bronze leaves.