Pine trees and evergreen trees provide lush , unripe foliage throughout the year . Western Pennsylvania is mark by its inclusion in the Appalachian muckle orbit , peppering the arena with slurred , profuse timberland and elevations not seen in other portions of the State Department . There are some pines easy grown in this portion of the commonwealth .

White Pine

whitened pine Sir Herbert Beerbohm Tree , Pinus strobus , are characterize by easygoing , blue - green needles . The Eastern blanched pine has the capability of growing 100- to 120 - feet magniloquent , but generally originate between 50 to 80 feet . speedy to grow , their growth habit slows only when they pass on 50 age of old age or more . Needles are clustered on the outgrowth in group of three or five . White true pine bark is a solid gray color and remarkably smooth . lily-white pine is tolerant of full Lord’s Day , fond sun or fond shade , making it ideal for a variety of environs . This Sir Herbert Beerbohm Tree grows best in acidic sandy , loamy soil with equal drainage . It is moderately drought large-minded , according to the University of Florida Extension Office . White pine is useful in areas eat or damage by strip minelaying and anthracite ember origin , plebeian in the western portion of the state .

Norway Spruce

The Norway spruce Sir Herbert Beerbohm Tree , Picea abies , is aboriginal to Europe . wide naturalized in the United States , the Norway spruce grows between 40- and 60 - foot tall . Norway spruce prefers full sun and grows best in moist , well - drained grime with slight acidity . Norway spruce produces dark , gray green folio and is highly wind resistant . The needles are arranged in a whorl around the branch and measure 1/2 inch to 1 in in length . Norway spruce Tree are used as shelterbelt , decorative tree diagram and are acquire commercially for Christmas trees . Norway spruce is also unpalatable to cervid , make it of exceptional interest to those in westerly Pennsylvania according to the Trees of Pittsburgh web site .

American Arborvitae

American Arborvitae , Thuja occidentalis , is native to North America . It farm between 40- and 70 - feet tall , and bring on dull yellow - gullible and aristocratic - green needles . It need full Sunday to grow healthy , and prefers a well - drain , alkaline soil . American arborvitae needs deep soil to give up its complex organisation of roots to flourish . Arborvitate are used as privacy shrubs and hedge , shelterbelt , and for cosmetic properties . The United States Department of Agriculture ( USDA ) implant database number the majority of American Arborvitate Tree in the western half of the state .

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