An herbicide that is applied before a plant emerges or before leaves sprout. Preemergents prevent seeds from germinating and growing and are used mostly to control annual weeds such as crabgrass.
preemergent weed killer
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 | Gardener's Dictionary. Taylor's Dictionary for Gardeners, by Frances Tenenbaum. Copyright © 1997 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. Read more |
