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June Weed of the Month: Horse Chestnut

Heath Keirstead | July 10, 2024
8/5x11 flyer for Horse Chestnut with images and this info: Large, showy, deciduous tree reaching 50-80 ft tall with a round crown. Large palmate leaves are opposite, divided into 5-7 leaflets with finely toothed margins. Tall, white spikes of large, white flowers with yellow and red spots. Fruit is round, prickly capsule with 1-3 smooth, brown seeds. Once established, competes with native species for sunlight, moisture, and nutrients. Seeds, leaves, and sprouts are highly toxic and can cause death. Manual: Girdle 10 cm band of bark and phloem layer from around trunk. Damage to xylem could cause suckering. Chemical: apply herbicide to cut stems; retreat suckers. Follow all label instructions and wear appropriate protective equipment. Replace with Oregon white oak or Pacific dogwood. Learn more at www.marionswcd.net/plants/horse-chestnut/ Marion County Cooperative Weed Management Area.
8.5 x 11 flyer for horse chestnut. Click here for pdf version.
Square graphic for Horse Chestnut with images and this info: Large, showy, deciduous tree reaching 50-80 ft tall with a round crown. Large palmate leaves are opposite, divided into 5-7 leaflets with finely toothed margins. Tall, white spikes of large, white flowers with yellow and red spots. Fruit is round, prickly capsule with 1-3 smooth, brown seeds. Once established, competes with native species for sunlight, moisture, and nutrients. Seeds, leaves, and sprouts are highly toxic and can cause death. Manual: Girdle 10 cm band of bark and phloem layer from around trunk. Damage to xylem could cause suckering. Chemical: apply herbicide to cut stems; retreat suckers. Follow all label instructions and wear appropriate protective equipment. Replace with Oregon white oak or Pacific dogwood. Learn more at www.marionswcd.net/plants/horse-chestnut/ Marion County Cooperative Weed Management Area.
Square graphic for horse chestnut. Click here for pdf version.

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