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Astilbe arendsii 'Gladstone'
Item AB173

'Gladstone' is one of the first Astilbe to bloom, with dense spikes of pearly white flowers, small dainty flower plumes that look like lace. Nice frontal planting Astilbe as it does not get large. This is a perennial, rhizomatous herbs with compound, green leaves and rich, upright inflorescences in late spring and early summer. They grow in part shade in humus-rich soils and in full sun in swampy soils. Deadhead spent flowers. To maintain vigor and flower quality, divide every 3-4 years and replant in early spring, while plants are still dormant. Discard old, woody rhizomes. It is easily propagated, by dividing these rhizomes, in early spring. Monitor soil moisture all season. After flowering, feed with a balanced fertilizer, following package directions. Astilbe_Gladstone2

Astilbe_Gladstone3

   
Size: 2-3 eye • Hardiness: Zones 4-8

Common: Astilbe (False Spirea) • Family: Saxifragaceae

Botanical: Astilbe arendsii 'Gladstone'

Height: 18-24" • Spacing: 18"

Bloomtime: Late Spring • Flower: Dense White Plumes

Foliage: Dark Green Foliage

Exposure: Full Shade to Partial Shade

Pests: No serious insect or disease problems. Unlike the Chinese astilbes (A. chinensis cultivars), the arendsii hybrids have little if any drought tolerance. Foliage decline (leaves brown up), sometimes with significant dieback, will often occur in hot summers and/or periods of drought if soils are not kept uniformly moist.

Notes: Astilbes are a mainstay of shade and woodland gardens. They are clump-forming perennials which feature graceful, fern-like mounds of mostly basal, 2-3 ternately compound leaves, usually with sharply-toothed leaflets, and tiny flowers densely packed into erect to arching, plume-like flower panicles rising above the foliage on slender, upright stems. One of the arendsii hybrids. The arendsii hybrids are a large group of hybrids involving crosses between A. chinensis, A. japonica, A. thunbergii and A. astilboides and are named after German nurseryman George Arends (1862-1952). Because of the different and sometimes complex parentage of the plants lumped under this hybrid grouping, arendsii hybrids can vary considerably as to plant size, inflorescence shape, leaf color/shape and bloom period. Generally, however, they are early which grow 2.5 to 3 feet tall with ovate to lance-shaped leaflets.

Planting instructions: May be planted in any well-drained soil. Dig a hole large enough to encompass the roots without bending or circling. Set the plant in place so the crown (part of the plant where the root meets the stem) is about 1-2 inches below the soil surface. Cover with soil to the original soil surface and water thoroughly.

Easily grown in average, medium, well-drained soils in part shade to full shade. Prefers moist, humusy, organically rich soils. Soils must not be allowed to dry out. If regularly watered, foliage will usually remain attractive throughout the growing season. A summer compost mulch helps retain soil moisture. Removing faded flower stalks will not prolong bloom but may improve plant appearance, particularly if a ground cover look is desired. On the other hand, many gardeners leave the flower stalks in place after bloom because of the continuing ornamental interest of the dried seed heads. Divide clumps when overcrowding occurs (every 3-4 years).


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