Onion Grass - Knowledgebase Question

Alexandria, VA (Zone 7A)
Avatar for kprunty4
Question by kprunty4
March 23, 2007
Onion grass is running rampant in my flower bed. It is growing up in the existing flowers and plants. Do you have any suggestions for controlling it's growth and recommendations to keep it out of the plants that are already there?

Answer from NGA
March 23, 2007
Onion grass is a bulb (not a grass) and it is difficult to control. You can try digging it out by hand, being sure to take all the baby bulbs that surround the main bulb. If you don't take out the little bulbs, you will just end up with more than when you started. Or, you can try using the herbicide glyphosate on it. In a flower bed, the wipe on method of applying it is usually safer than spraying since it will kill your flowers if it contacts them. The onion grass foliage does not absorb the chemical very well, so you may find it is more effective if you cut it down and then wipe or spray it onto the freshly cut ends. Another option can be smothering it. Trim the onion grass off short, cover it with several layers of newspaper, and mulch on top of that. Also, do not allow it to flower and set seed, and avoid tilling an area where it is growing as this will spread the bulbs and yield even more clumps of it. I hope this helps.

You must be signed in before you can post questions or answers. Click here to join!

« Return to the Garden Knowledgebase Homepage

Member Login:

( No account? Join now! )

Today's site banner is by JebobaTea and is called "White Flower Fireworks"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.