On The Radio – Leaves drop early due to fall drought


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Some leaves in Iowa fell to the ground before changing color this year due to drought. (Liz West/flickr)
Jenna Ladd | October 9, 2017

This week’s On The Radio segment discusses how drought conditions in late September pushed some trees into early dormancy.

Transcript: Tree leaves in Iowa began changing colors and falling to the ground earlier than usual this year due to drought conditions.

This is the Iowa Environmental Focus.

Leaf color change is closely tied to weather conditions. During the last week of September, the U.S. Drought Portal reported that about thirty percent of Iowa was experiencing abnormally dry conditions and about twenty-five percent of the state was in a moderate drought.

Officials from the Iowa Department of Natural Resources explained that if trees do not have enough moisture, they can be pushed into dormancy earlier than usual. As a result, many leaves died and fell from trees before they bursted into autumn’s hues of red, yellow and orange this year.

In a typical year, leaves change color in northern Iowa between the last week of September and the second week of October, from the first to third weeks of October in central Iowa and from the second to fourth weeks of October in southern Iowa.

For more information, visit iowa-environmental-focus-dot-org.

From the UI Center for Global and Regional Environmental Research, I’m Betsy Stone.

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