Regions / Midwest
Selecting plants suited to the Midwest 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 Midwest region lies in USDA Plant Hardiness Zones 3 through 6 and in AHS Heat Zones 1 through 8. Weather varies dramatically from state to state and season to season. However, generally speaking, the Midwest region enjoys cold winters with snow, short springs, cool falls, and hot, humid summers.
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!
Award-winner Allium 'Ambassador' is one of the tallest and most architectural onions with its large globe-shaped inflorescence, 8 in. across (20 cm), densely packed with hundreds of small, star-shaped purple flowers. Blooming for up to 5 weeks in late spring to early summer, this spectacular Allium enjoys one of the longest blooming season.
Regarded by some as one of the very best, Allium 'Firmament' is a rather unusual Allium. Instead of having round flowerheads, it is only two-thirds of the sphere, about 4-5 in. wide (10-12 cm). It is packed with star-shaped, dark silvery purple flowers, each flower being comprised of dark purple florets adorned with shimmering silver anthers.
Tall and majestic, Allium 'His Excellency' is a most architectural flowering onion with its large globe-shaped inflorescence, 5 in. across (12 cm), densely packed with hundreds of small, star-shaped violet-blue flowers. Blooming for weeks in late spring to early summer, this spectacular Allium remains ornamental in the garden well into summer. Planted in groups, it makes a terrific focal point within the border.
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.
Allium amplectens 'Graceful Beauty' (Ornamental Onion) is a hardy perennial bulb featuring globe-shaped flowerheads, up to 3 in. across (7 cm), packed with 10 to 50 starry white florets adorned with lavender stamens and purple anthers. Blooming in late spring to early summer, this particularly pretty Allium enjoys long-lasting blooms and remains ornamental in the garden well into summer.
Allium atropurpureum is a hardy perennial bulb with star-shaped, deep purple-red flowers packed into a half-globe umbel, 2 in. wide (5 cm). Each flower is comprised of deep merlot-purple florets adorned with blueberry-purple eyes, which creates a wonderful contrast of colors. Blooming in late spring to early summer, the flowers are borne on sturdy, upright stems above strap-shaped green leaves.
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!