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The ornamental pear and its cultivars, Redspire and Aristocrat are the tallest of the flowering trees, reaching up to 50 feet high. Fauer is the smallest at a diminutive 20 feet tall. The Capital variety is in between, reaching up to 35 feet in height.
â¢ Standard-size pear tree can grow to 40 feet tall if not pruned and have a spread of 30 to 40 feet. Standard pears are commonly pruned from 15 to 25 feet tall with an equal spread.Plant standard pear trees 18 to 25 feet apart. Standard pears fruit in 4 to 8 years and can live for 75 years. Standard-size pear tree can grow to 40 feet tall if not pruned and have a spread of 30 to 40 feet. Standard pears are commonly pruned from 15 to 25 feet tall with an equal spread.