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Starting Thinking About Crabgrass

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Weather has warmed throughout Tennessee and things are in bloom. Keep your eyes on blooming forsythias as they provide a window into crabgrass germination.

Crabgrass plants germinate once soil temperatures (at ~ 2 inches deep) measure greater than 55 F for four consecutive days and nights. Consequently, forsythias also produce bright yellow petals under these same conditions.

Preemergence herbicides for crabgrass control should be applied prior to crabgrass germination. Turfgrass managers intending to use preemergence

herbicides for crabgrass control should apply these materials while forsythias are still showing bright yellow blooms. Applications made after these petals have dropped from branches will tend to be less effective.

See our fact sheet for more information on crabgrass control in Tennessee

Start Date

3/10/2012

Expires

5/16/2012

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Tennessee Turfgrass Weeds