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A powdery mildew-plagued butterfly weed plant appears on Long Island, N.Y., on Sept. 24, 2024. Diseased plants should be cut down in autumn to avoid re-infecting the garden next spring. (Jessica Damiano via AP)

A powdery mildew-plagued butterfly weed plant appears on Long Island, N.Y., on Sept. 24, 2024. Diseased plants should be cut down in autumn to avoid re-infecting the garden next spring. (Jessica Damiano via AP)

This Nov. 23, 2023, image provided by Jessica Damiano shows fallen leaves that have been pushed into a garden border to serve as mulch on Long Island, N. Y. (Jessica Damiano via AP)

This Nov. 23, 2023, image provided by Jessica Damiano shows fallen leaves that have been pushed into a garden border to serve as mulch on Long Island, N. Y. (Jessica Damiano via AP)

FILE- Fall foliage is on display Wednesday, Oct. 18, 2023, in Cuyahoga Valley National Park in Northfield, Ohio. (AP Photo/Sue Ogrocki, File)

FILE- Fall foliage is on display Wednesday, Oct. 18, 2023, in Cuyahoga Valley National Park in Northfield, Ohio. (AP Photo/Sue Ogrocki, File)

FILE - This July 11, 2017 photo shows Purple Coneflowers appear in a front yard garden in Dallas, Texas on July 11, 2017. Instead of cutting every perennial to ground level before the first frost, gardeners are now being selective. Allowing the dried seed heads of plants like purple coneflower (Echinacea), and others to stand all winter will provide food for nonmigratory birds. (AP Photo/Benny Snyder, File)

FILE - This July 11, 2017 photo shows Purple Coneflowers appear in a front yard garden in Dallas, Texas on July 11, 2017. Instead of cutting every perennial to ground level before the first frost, gardeners are now being selective. Allowing the dried seed heads of plants like purple coneflower (Echinacea), and others to stand all winter will provide food for nonmigratory birds. (AP Photo/Benny Snyder, File)