Regions / Coastal South
Selecting plants suited to the Coastal 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 Coastal South region lies in USDA Plant Hardiness Zone 9 and in AHS Heat Zones 9 through 11.
Noted for its shorter stature, Alcea rosea 'Spring Celebrities White' (Hollyhock) is a short-lived perennial which produces sturdy spikes of large, double, pristine white flowers. Blooming from mid to late summer, the striking flowers are arranged all round the spike and bloom from the bottom up. An old garden favorite, this hollyhock is perfect for the sunny border or containers. Great for small gardens too!
A butterfly magnet, Allium 'Millenium' is a bulbous perennial with profuse, large, rounded umbels, 2 in. across (5 cm), tightly packed with bright rosy purple flowers. Blooming in mid to late summer, the luminous flowers are borne on sturdy, upright stems just above the attractive foliage clump of onion-scented, grass-like, glossy deep green leaves, which remain attractive all season long. The flowers are both long lasting (up to 4 weeks) and excellent as cut flowers. This Allium is not bothered by heat and reseeding is much less a problem than in other alliums.
Allium 'Summer Beauty' is a bulbous perennial with charming, rounded umbels, 2 in. across (5 cm), packed with up to 30 soft lavender-pink, bell-shaped flowers. Blooming in mid- to late summer, the luminous flowers are borne on sturdy, upright stems above a foliage of onion-scented, strap-shaped leaves, which remains attractive all season long.
A favorite of many gardeners, multiple award-winner Allium 'Purple Sensation' is a striking ornamental onion with its inflorescence consisting of dozens of small, star-shaped, rich violet-lilac flowers, forming perfectly round flowerheads, 3 in. wide (8 cm). They are borne atop sturdy stalks, which arise from a group of 6 to 8 handsome, blue-green, straplike leaves.
An unusual, ivory-white dwarf ornamental onion, Allium karataviense 'Ivory Queen' (Turkestan Onion) is quite attractive with its elegant globe-shaped clusters, 5 in. wide (12 cm), of starry white flowers nestled in a beautiful foliage consisting of wide and recurved, gray-green leaves, slightly red edged. A very ornamental ensemble!
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.
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.
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.