Apple tree suckers will grow roots, so you can plant them to grow new trees. Suckers are one of the ways that trees propagate themselves. Keep in mind that many apple trees are grafted onto different root stocks, so the apples from the sucker-grown tree may not be the same as from the original tree.
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Anne Baley is a writer and photographer living in Southeast Michigan. She has written dozens of articles about places she has discovered while traveling throughout the United States. Baley's work has appeared in a variety of online outlets, including EndlessSunday, GardenGuides and Travels.