If you plant a lone sour cherry tree, expect fruits to develop after bees pollinate the blossoms. However, sweet cherry trees must not be planted by themselves, as another compatible sweet cherry tree must bloom at the same time to ensure cross-pollination. You cannot plant two of the same sweet cherry tree cultivar and expect good cross-pollination. Another cultivar is needed. Read more: Do I Need Two Cherry Trees to Pollinate? | eHow.com http://www.ehow.com/info_8205276_do ... y-trees-pollinate.html#ixzz1SrAJa6J2
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