Yellow-brown male catkins appear in fall, remaining on tree through winter and opening in spring.
#White spire birch full
Cultural Conditions: Light: Full sun (6 or more hours of direct sunlight a day) Partial Shade (Direct sunlight only part of the day, 2-6 hours) Soil Texture: Loam (Silt) Sand Shallow Rocky Soil pH: Acid (Whole Plant Traits: Plant Type: Tree Woody Plant Leaf Characteristics: Deciduous Habit/Form: Erect Multi-trunked Pyramidal Growth Rate: Rapid Maintenance: High Texture: Fine.Attributes: Genus: Betula Species: populifolia Family: Betulaceae Life Cycle: Woody Recommended Propagation Strategy: Seed Country Or Region Of Origin: Southeastern Canada to Virginia Particularly Resistant To (Insects/Diseases/Other Problems): Bronze birch borers.Tags: #black #full sun tolerant #heat tolerant #drought tolerant #interesting bark #white flowers #white bark #winter interest #high maintenance #upright form #year-round interest #fast growing #wind tolerant #smooth bark #birch #non-showy flowers #multitrunked #deciduous tree #fall color yellow See this plant in the following landscape: Cultivars / Varieties: Plants stressed by insects seem more susceptible to cankers. Watch for leaf spot problems. Although this gray birch has some susceptibility to aphids, birch skeletonizer and dieback, these problems are usually considered to be somewhat minor in comparison to the birch borer and birch leaf miner. However, it is susceptible to leaf miner. Unlike many varieties of Birch, the Japanese Gray Birch is somewhat resistant to bronze birch borer. It is not recommended for planting south of USDA Zone 7. This cultivar can become stressed by summer heat and humidity. Birches are considered a "pioneer" species and, thus, tends to grow quickly when young.ĭiseases, Insects, and Other Plant Problems: Do not prune in winter or spring when the sap is running because it will bleed. It needs little pruning, but if necessary, you can prune during the dormant season. In optimum growing conditions, plants will easily spread by suckers. and where shallow root systems are generally covered with snow throughout the winter. The plant performs best in cool northern climates where summer temperatures rarely exceed 75 degrees F. Keep the root zones cool and moist and consider using soaker hoses and bark mulches. It seems to tolerate drier soils in its native range. Japanese Gray Birch grows best in medium to wet, well-drained, sandy or rocky loams in full sun to part shade. japonica when introduced into commerce in 1983, but that designation was subsequently changed when it was determined 'Whitespire' was in fact a gray birch. 'Whitespire' was originally named as a cultivar of Betula platyphylla var. Vegetatively propagated plants of this cultivar are considered to have better resistance to bronze birch borer than seed propagated plants, resulting in the use of the cultivar name 'Whitespire Senior' by some nurseries as a way of designating those plants which have been vegetatively propagated. It will self-seed and form an attractive stand of trees. However, it does not tolerate dry soils and has shallow roots. This plant has many benefits including ease of transplant, that it casts light shade, and tolerates heat, wind, deer, and drought.
The cultivar, 'Whitespire', is best known for its upright form, non-exfoliating white bark, dark green leaves and attractive yellow fall color. Tiny monoecious flowers appear in early spring in separate catkins on the same tree: yellowish-brown male flowers in single catkins (to 4” long) at the branch tips and greenish female flowers in smaller, upright catkins (to 1/2” long). The species is noted for its non-peeling chalky white bark and its long-pointed triangular green leaves. The species, Betula populifolia, or gray birch, is a short-lived, narrow-columnar, suckering, deciduous tree that typically grows to 20-40’ tall. Phonetic Spelling BET-yoo-luh pop-yoo-lih-FOH-lee-uh Descriptionīetula is Latin for birch and describes a genus of about 60 species of deciduous trees and shrubs found in many gardens and landscapes throughout the northern hemisphere.
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