Answer: I wouldn't top the trees for a few reasons: it is unattractive, it isn't the healthiest thing you can do for your trees, and, it won't stop the fruit production. There is a product called "Fruit Eliminator" that is recommended for stopping sweet gum trees from producing fruit. This product also works on crabapples, cottonwood, etc. You can purchase it from Jerry Baker's Gardening Products at 1-800-888-0010.
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