By Ruth Rogers Clausen
Perennials are the mainstay of any backyard. yet how do you decide from the hundreds of thousands to be had, and deal with those you have already got? Essential Perennials is helping you choose precisely which vegetation will carry you the sweetness you will want and should thrive within the stipulations you could provide. Trusted backyard specialists Ruth Rogers Clausen and Thomas Christopher specialise in what each gardener must recognize. for every plant you’ll locate info on flower colour; season of bloom; foliage features; top and width; gentle standards; and hardiness and warmth sensitivity. You’ll additionally study cultural counsel, the main impressive cultivars for every species, and no matter if a plant has any specific requisites or capability problems.
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Tall under ideal conditions; more often 2–3 ft. Handsome leathery, dark-green foliage is deeply cut into three to five lobes. -long panicles of large, violet or deep blue flowers. Prefers consistently moist soils; a fine choice for wet soil beside water features, in damp woods, and rain gardens. ‘Arendsii’ (syn. Aconitum ×arendsii). Branched Aconitum carmichaelii ‘Arendsii’ panicles of large, strong azure-blue helmet flowers in fall. Stout stems seldom need staking. Introduced by Georg Arends of Germany.
Decorative even when not in bloom. Allium thunbergii ••reddish violet, white ••fall ••18–24 in. × 10 in. ••sun, part shade ••Z5–8 Japanese onion. Japan. This underused species deserves a wider audience, if only for its late bloom time. Through the season, slightly untidy tufts of mid-green, grassy foliage, triangular in cross section, mark their spot. In late summer, sturdy, 8- to 9-in.
Ajuga Ajuga genevensis Lamiaceae bugleweed Bugleweeds have gotten a bad rap for being invasive. They certainly can be a nuisance when spreading into your lawn, but in a spot where their spread can be controlled, their vigorous growth makes them ideal groundcovers. Bugleweed foliage is attractive—the undivided leaves are borne in opposite pairs on square stems, and superior cultivars offer evergreen, colored, sometimes textured leaves that provide interest all year. In late spring and early summer bugleweeds bear terminal spikes of small, two-lipped, brilliant blue, pink, or white flowers carried in tiered whorls (verticillasters) up the stem.