How To Get Rid Of Onion Grass In Flower Beds

Cut onion grass very short to prevent flowering.

How to get rid of onion grass in flower beds. Because onion grass spreads both by reseeding itself and by the cormlets reproducing beneath the soil a gardener must actively strive to kill onion grass to prevent it from spreading. Destiny herbicide can be used on buffalo kikuyu couch and zoysia but not on ryegrass or qld blue couch. You should follow the directions given with the herbicide but in most cases you simply spray the herbicide on the weeds you want to eliminate. Use the weeding fork to dig up the onion grass manually from the soil.

If you have an extensive problem onion weed and onion grass can be treated with a selective herbicide called destiny herbicide but it is very expensive and will require a licensed professional lawn contractor to apply it for you. Douse onion grass with undiluted white vinegar. Combine 1 gallon of white vinegar with 1 cup of rock salt or regular table salt. By cutting onion grass to the same height as your lawn grass you can stop it from spreading.

In unused garden beds the best method is cutting off the foliage at ground level using a lawn mower or tools to slash away the leaves then covering the area with dark coloured plastic for a few months. Treat the wild onion in the early fall to november with a follow up treatment near the end of winter into early spring february or early march. The next step to kill wild onions is to treat the area with either a non selective herbicide like round up or boiling water. This will prevent sunlight and moisture getting to the plant without which it will eventually die off.

Preventing wild onion reinfestation. You can even use epson salt if you have it and its less expensive. Do not try to shake excess dirt off back into the hole and do not compost. Throw the entire clump away.

This will destroy a plant that s above ground but it won t eliminate all of the bulbs beneath the soil. Due to the hardy break away bulblets you can expect that they will grow back at least one time. Add 1 tablespoon of dish soap and stir until it is completely blended. Dig up the entire plant by hand or apply glyphosate to the undesired onion grass.

If you do this will only respread the wild onion bulbettes back into your garden. Put the mixture into the spray bottle and soak the grass. After removing the wild onion plants keep a close eye on the area and repeat the process if any new wild onions start to grow. Onion weed can be effectively and fairly safely eliminated by using an herbicide containing glyphosate.