June 20th, 2024 – Have you noticed dead clumps of leaves on your trees? It’s a sign that the reign of the 17-year cicada is winding down. Experts have some tips for cicada aftercare and what to do with all of those dead insects.
According to arboretum Plant Health Care Leader, Stephanie Adams, cicada remains make an excellent fertilizer. “They decompose and provide a nutrient boost that will enhance growth next year,” Adams said.
Cicadas can also be composted with green plant material and brown material like dried leaves. “Keep the pile moist and turn it often. This will help the insects break down faster and reduce odor.” said Stephanie Adams.
Adams advises removing any netting used to protect young trees from cicada egg-laying. Regularly water trees and shrubs, especially those planted in the last two to three years. In dry spells, water large trees too. Apply a 3 to 4-inch layer of mulch around trees to maintain soil moisture and protect roots.
As for those clumps of brown dead leaves, also known as “flagging,” Adams says to monitor trees for signs of long term damage, such as dying branches. Flagging may last through this year and into next, but most of the time is not harmful to the tree long term. “Prune dead branches on small trees for appearance. On large trees, the dead twigs will fall off naturally over time.” said Stephanie Adams.
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By: Isaiah Bradford
