Regions / Upper South
Selecting plants suited to the Upper South climate is 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 Upper South region lies in USDA Plant Hardiness Zone 6 and in AHS Heat Zones 2 through 8. It typically enjoys four distinct seasons. Rain and snowfall tends to be evenly distributed throughout the seasons.
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.
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.
Hardy, Alstroemeria 'Mauve Majesty' (Peruvian Lily) is a tuberous perennial with lance-shaped, dark green leaves and a profusion of long-lasting, large, funnel-shaped, bright mauve pink flowers, adorned with a creamy yellow throat and burgundy streaks.
Exotic-looking, award-winning Amaranthus cruentus 'Velvet Curtains' is a vigorous annual or biennial plant with erect, dark crimson plumes and stunning, ovate, red colored foliage. It enjoys an upright, bushy habit and helps create dramatic mixed borders. Great for the back of the border or as a filler, its long-lasting flower spikes make excellent cut flowers that are prized by florists for their beauty.
Named after the Greek goddess of love, Amaryllis, 'Aphrodite' (Hippeastrum) is a graceful beauty with huge, white, double flowers, up to 9 in. across (22 cm), delicately brushed with blush-pink on the petal tips and adorned with blood-red thin margins. Each flower is packed with 13-17 broad tepals and 3-10 petaloids.
Award-winning Amaryllis 'Apple Blossom' (Hippeastrum), an old-time favorite, is a real knockout with its large, funnel-shaped, white flowers, up to 7 in. across (17 cm), delicately brushed with soft pink. Long-lasting, they are adorned with an extensive bright green throat lined with a ring of red dots. Introduced in 1954, this large flowering Amaryllis is one of the most popular pink Amaryllis.
Slightly fragrant, Amaryllis 'Blossom Peacock' (Hippeastrum) is a stunning beauty with large, white, fully double flowers, up to 7 in. across (17 cm), delicately touched with rosy-pink along the edges. The pretty blossoms are packed with 15-18 tepals and up to 2 petaloid stamens. A magnificent double flowering Amaryllis noted for the exquisitely proportioned and perfectly sculptured blooms.