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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¢ Semi-Dwarf pear tree will grow to 25 feet tall if not pruned and will grow as wide. Semi-dwarf pears are commonly pruned from 12 to 15 feet tall with equal spread. Semi-dwarf pears bear fruit in 3 to 5 years and can live to 60 years old. 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.