TheGardenLady received this question from Donna.
My dad has a yellow transparent apple tree he has had for 30 years and the last
few years it has started growing a differant kind of apple along with the
transparent apples . He also has another yellow transparent that started
doing the same thing. What causes this?
TheGardenLady suspects that your father’s yellow transparent apple tree was grafted onto another apple rootstock and that it is sending up suckers with different apples.  Suckers are branches that grow from the base of the tree – up to 4 foot off the ground -and can come from the grafted root. But to do it after 30 years is unusual. You don’t want suckers so you should prune off any suckers.  See here.
However to be absolutely sure about what is happening to your father’s apple trees, send a photograph to Stark Bros. Nursery, a nursery that has been in business for 200 years and are authorities on the subject of fruit trees. TheGardenLady wrote this post about the nursery. You should send them a photo of the two different apples on the tree. Send the photo or photos by email to info@starkbros.com or to Stark Brothers P.O. Box 1800, Louisiana, Missouri 63353 and write a note about the problem you want solved. Or call them at 800.325.4180 to see what other information they need.
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