Answer: It's true that there's a chemical you can spray on the trees while they're in flower that will prevent fruit from forming. Timing is everything - if blossoms open after the treatment, they will produce olives. Here's another way to stop the trees from producing fruit: Olive trees can withstand heavy pruning. By selectively thinning out the fruiting branches each year you can minimize the crop of olives that the tree produces. Carefully inspect your tree and you will be able to determine which branches will flower and bear fruit. They are the smallest, newest branches on the tree. Remove these small branches by cutting them back to the limbs that form the structure of the tree. You'll end up with a picturesque specimen tree without the messy fruit drop.
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