How do I kill "feather" grass in my yard?

Asked July 17, 2018, 2:51 PM EDT

We've been trying to kill this feather grass in our yard for years, but it keeps popping up other places near by and now we have a big patch of it again. I think it might also be called pampas grass, and I found this online and wanted to see if you would advise this or something else.
Thanks for your help.

Large Clumps of Pampas Grass

1

Wear heavy work gloves. Grasp several pampas grass stalks, bunching them together. Cut the stalks down to about 2 inches above the ground with a pair of gardening shears. Continue in this manner until you have cut all the grass down to a manageable size. Place the cut grass into a large garbage bag, secure closed and dispose of at a landfill.

2

Put on a pair of rubber gloves. Spray the cut stalks immediately with a ready-to-use herbicide containing glyphosate as the active ingredient.

3

Repeat the treatment seven days later. Monitor the location regularly, spraying newly sprouted pampas grass with the glyphosate herbicide.

Things You Will Need

  • Heavy work gloves
  • Safety goggles
  • Long-sleeve shirt
  • Pants
  • Garbage bags
  • Gardening shears
  • Rubber gloves
  • Herbicide containing glyphosate

Ramsey County Minnesota weed control invasive plants plume grass hardy pampas grass

1 Response

Thank you for the question. True pampas grass (Cortaderia selloana) is a large perennial grass native to Brazil, Argentina, and Chile and is not hardy in Minnesota. You may have plume grass, also called hardy pampas grass (Erianthus ravennae) growing in your yard. It is hardy in your area and grows 8 to 12 feet tall. Hardy pampas grass is very upright and open in habit, with large, white plumed flowers. Read a description of it here: https://extension.illinois.edu/grasses/plume_grass.cfm

The directions you found should work on your plant but you will need to keep a close eye out for new shoots and either dig them out or spray with glyphosate. Always follow the directions on the herbicide package. Removing spent plume heads before they go to seed will help control the spread as well. If you like the plant but want to confine it you can take portions out and drop a barrier, such as metal or plastic, into the ground to contain the root system.