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Female Ginkgo Flowering

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From: E Byers City: Winston Salem, NC
How do you determine the exact time window of flower onset? We have a tree at our elementary school that we want to spray to try and stop the fruit. Cutting it down is not an option. Thanks.
	Extension Message From: Jay Hayek Extension Specialist, Forestry Department of Natural Resources and Environmental Sciences jhayek@illinois.edu
Visually, by observing the development of the small female flowers. Why is cutting down this tree not an option? Personally, I believe spraying trees to prevent fruiting is a complete waste of time and money. The choice is obviously yours; however, spraying this Ginkgo is not going to solve the issue of stinky fruit.
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