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  2. Pyrus ussuriensis - Wikipedia

    en.wikipedia.org/wiki/Pyrus_ussuriensis

    The tree grows to a height of about 15 meters (49 ft) and prefers well-drained loam-type soils. It is considered the hardiest of all pears. [3] When planted in milder climates, the trees have been known to be killed by freezes after they begin budding. [3] Many species of birds and mammals feed upon the fruit of this species.

  3. Pyrus calleryana - Wikipedia

    en.wikipedia.org/wiki/Pyrus_calleryana

    Pyrus calleryana, also known as the Callery pear or Bradford pear, is a species of pear tree native to China and Vietnam, [2] in the family Rosaceae. It is most commonly known for its cultivar 'Bradford' and its offensive odor, widely planted throughout the United States and increasingly regarded as an invasive species .

  4. Pyrus communis - Wikipedia

    en.wikipedia.org/wiki/Pyrus_communis

    Pear tree in flower Tiny unripe pears. Common pear trees are not quite as hardy as apples, but nearly so. However, they do require some winter chilling to produce fruit. A number of Lepidoptera caterpillars feed on pear tree leaves. [citation needed] For best and most consistent quality, common pears are picked when the fruit matures, but ...

  5. Bosc pear - Wikipedia

    en.wikipedia.org/wiki/Bosc_pear

    Bosc Pear, from The Pears of New York (1921) by Ulysses Prentiss Hedrick [1] The Beurré Bosc or Bosc is a cultivar of the European pear (Pyrus communis), originally from France or Belgium. Also known as the Kaiser, it is grown in Europe, Australia, British Columbia and Ontario, Canada, and the U.S. states of California, Washington, and Oregon.

  6. Plant nutrition - Wikipedia

    en.wikipedia.org/wiki/Plant_nutrition

    A relationship between potassium nutrition and cold resistance has been found in several tree species, including two species of spruce. [12] Potassium helps in fruit coloration, shape and also increases its brix. Hence, quality fruits are produced in potassium-rich soils.

  7. Neil Sperry: Here’s your winter to-do list for your North ...

    www.aol.com/neil-sperry-winter-list-north...

    • Pruning of fruit trees, vines. Peach and plum trees come to mind first. Your goal is to maintain them in a cereal-bowl shape, 9 to 10 feet tall and 14 to 16 feet wide.