It is hardy to zone (UK) 3. The catkins (elongated, drooping clusters of tiny flowers without petals) appear just before the leaves emerge. This birch will need additional water during dry periods. Betula lenta, or Sweet Birch, is a deciduous, pyramidal shaped tree, maturing into a more rounded shape that may grow 60 to 70 feet tall. How To Start These Seeds: An acid, moist soil is preferred. Also known as the Black Birch or Cherry Birch. Defer any necessary It can be planted in zones 3 to 8. Tree size: 40 to 55 feet tall; 35 to 45 feet wide in landscape settings. Sweet Birch is a large deciduous tree with reddish-brown to reddish-black bark. River birch trees grow rather quickly, at a rate of about 1.5 feet per year. Growth Rate This tree grows at a medium to fast rate, with height increases of anywhere from 13" to more than 24" per year. Seedlings have moderate growth rate and are usually outplanted as 2 year old bareroot stock. Becomes rounded with an irregular crown as it matures. Native to eastern North America, it is commonly found in forests of both low and high elevation as far south as the mountains of Georgia, but, except for a few cool spots, it is rare in the Piedmont of North Carolina. When choosing a location, keep in mind that the Sweet Birch has a fast growth rate. Growth habit: Upright, pyramidal when young. birch seed is usually counter-productive. The yellow birch can reach 3' in diameter and 75' in height.Sweet birch is basically found in New England, ... revenue (million USD), market share and growth rate of Birch Wood in these regions, from 2013 to 2025 (forecast), covering • North America • Europe • China • Japan • Southeast Asia • India. Betula lenta L. Sweet Birch Betulaceae Birch family Neil I. Lamson Sweet birch ... Reproduction and Early Growth Flowering and Fruiting-Sweet birch flowers are monoecious and borne in catkins. The seeds are a food source for a variety of birds. It is in flower in April, and the seeds ripen in October. By the age of 20 years, they usually are between 30 and 40 feet tall. In the wild it may grow to heights of 80 feet. Fertilization of tree and shrub seedlings at planting is generally not recommended. Betula lenta is a deciduous Tree growing to 24 m (78ft 9in) at a fast rate. It grows up to 75 feet in height and 40 feet in spread. The species is monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and is pollinated by Wind. The cherry-like bark is smooth on young trees and scaly on mature ones. Sweet birch grows at elevations up to 4,000 feet in the Appalachians. Given effective grass and weed control, river birch is easy to establish. The leaves turn golden-yellow in the fall. ... slightly faster than yellow birch, and at about the same rate as black cherry (Prunus serotina) (7).