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Summer Crabgrass Control

July 23, 2014

Crabgrass is an “annual” weed, which means it germinates in spring, then in summer the plants produce seed and then it dies in fall with the first frost.  Spring applied crabgrass preventers will stop most of the seeds from growing, however generally not every one.  Just when your lawn is thinned from fungus disease or insects, a stray crabgrass seed germinates in the weakened areas.  The crabgrass then hunkers down flat where your lawnmower can’t reach and spreads to choke out your remaining good grass.  Each plant produces seeds… lots of seeds!  These seeds then germinate next spring so even more crabgrass plants can threaten to win the battle for your lawn.

If you decide to wait till fall to let the frost kill your crabgrass, you will miss the chance to kill it before it produces all those seeds.  Spray crabgrass now with Ortho Weed B Gon MAX plus Crabgrass Control.  You can use this spray on any lawn type except St. Augustine, Centipede and Bahia.  This spray works best when you go after younger crabgrass plants.  For larger crabgrass plants you may need to repeat your spray in 2 to 3 weeks.

Crabgrass germinated in this area where the grass was thinned from a lawn fungus problem.  It is easier to kill before it gets big.

Crabgrass germinated in this area where the grass was thinned from a lawn fungus problem. It is easier to kill before it gets big.

This is a crabgrass seed head in summer when seeds are being spread over your lawn.  Notice the three fingers.

This is a crabgrass seed head in summer when seeds are being spread over your lawn. Notice the three fingers.

This photo of a mature crabgrass plant appeared in a Scotts publication about 20 years ago.  The caption:  “A single seed produced this monster crabgrass plant, which crowded out good grass as it grew.  Each plant is capable of producing tens of thousands of seeds for an even bigger problem next year.”

This photo of a mature crabgrass plant appeared in a Scotts publication about 20 years ago. The caption: “A single seed produced this monster crabgrass plant, which crowded out good grass as it grew. Each plant is capable of producing tens of thousands of seeds for an even bigger problem next year.”

 

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