How to Get Rid of Crabgrass From Flower Gardens


Crabgrass is an irritating annual grass that will continue to terrorize a garden until it is eradicated. Crabgrass can invade flower gardens and risk injuring the flowers. The best way to get rid of crabgrass is to extract it and take measures to prevent it from germinating for the next season.

Step 1

Grasp the crabgass firmly at the base and pull up all the roots. Loosen the patches of crabgrass with a garden trowel if necessary.

Step 2

Soak crabgrass that can't be pulled up or whose roots remain in the ground with a herbicide such as monosodium-acid-methane-arsonate that is safe for flowers and grass.

Step 3

Cut the crabgrass from around the flower bed if the two areas connect.

Step 4

Apply a 2-inch layer of mulch around the flower garden to block crabgrass growth.

Step 5

Apply a pre-emergent herbicide with active ingredients of siduron or dithiopyr during the spring season to block any crabgrass seeds from germinating. Make the application before the crabgrass appears.

Things You'll Need

  • Herbicide spray
  • Weed trimmer
  • Mulch
  • Pre-emergent weed killer
  • Black plastic liner


  • Garden Counselor Lawn Care: Getting Rid of Crabgrass
  • University of GEorgia: Weed Control
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Keywords: killing crab grass, weed control, flower garden weeds

About this Author

Lauren Wise has more than eight years' experience as a writer, editor, copywriter and columnist. She specializes in food, wine, music and pop culture. Her writing has appeared in various magazines, including "Runway," "A2Z," "Scottsdale Luxury Living" and "True West." Wise holds a Bachelor of Arts in journalism from Arizona State University.