Sedge weeds are some of the worst weeds when it comes to their ability to infiltrate your lawn.
They are highly invasive and very difficult to get rid of. Only some specific chemicals, that are not always easily available, target them without harming your lawn.
Sedges are part of the Cyperus genus which includes about 700 types of sedge. Sedges have triangular cross-sections and spirally arranged leaves in 3 vertical rows along the stem. A common factor in areas where these weeds tend to occur is poor soil.
For this article we are going to focus on two in particular that are commonly found in Australian lawns, Nutgrass and Mullumbimby Couch.
Botanical name: Cyperus Esculentus
• Gets its name from the nut-like tubers found on the roots (rhizomes) of the plant.
• Is identifiable as it is usually a lighter green than the rest of your lawn and tends to grow taller.
• Has 3 blades that shoot up from the stem and has a triangular stem rather than a circular stem like most grasses.
Botanical name: Cyperus brevifolius
• A perennial mat-forming, grass like sedge up to 15cm high with dark green, glossy, strap-like leaves
• Possesses tough long, rhizomes which are red to purple in colour
• Grows best in areas of excessive soil moisture and humidity
• Can be difficult to control due to a strong network of rhizomes from which individual plants can regenerate.
Nutgrass and Mullumbimby Couch are incredibly difficult to eradicate so it is best you act quickly before they spread and become almost impossible to remove.
You can remove them by digging them out with a small spade. But you have to be extremely diligent with this. Ensure there are no roots or bulbs left in the soil as they will reappear if left behind.
Sedge Post-Emergent Herbicides
If there is a large amount of Nutgrass or Mullumbimby Couch in your lawn, you will need to treat it with a selective herbicide such as Amgrow Sedgehammer or Sempra.
• Sedgehammer can be safely used on lawn varieties including bent grass, buffalo, couch, kikuyu, perennial ryegrass, QLD Blue couch and Tall fescue
• Sedgehammer is a 750g/kg water dispersible dry flowable formulation of Halosulfuron methyl.
Another herbicide option is Paspalum, Nutgrass and Clover Selective Weed Killer. But, you can only use it to spot spray buffalo and kikuyu turf varieties as it will harm your lawn as well. It is safe to cover spray on Couch (excluding QLD Blue Couch), Bent and Fescue turf varieties.
If you don’t treat these weeds, they will continue to multiply and infest your whole lawn. It’s definitely worth doing in order to save your lawn from continued infestation.
Remember to always follow the manufacturer’s instructions on the pack when using herbicides. These chemicals are generally on the expensive side. That said you only need a very small quantity to treat the affected area. Be aware that repeated applications may also be required.
For information on caring for your lawn visit our Lawn Care Page.
Specials and offers
Join our mailing list for great specials and top turf tips
Hi Marcus , just to let you know that the boys and yourself are a credit to your company. Their work ethics are second to none. Thank you.
- Mark, Lake Conjola
The boys who laid the lawn were AWESOME . .. very polite , worked hard and more than helpful with instructions for care.
- Bronwyn, Vincentia
Just wanted to thank you for the great product excellent service and the most professional experience we have had so far with our renovation. Josh and Joe were fantastic. Please feel free to use us as a referee to other potential clients, they won't regret it.
- Victoria & Gary, Illawarra
On behalf of our club I wish to pass onto yourself and Turfco are sincere thanks for your generosity with the recent supply of turf to Ray Robinson oval. This has assisted our club immensely with the upkeep and preseason preparation to our ground. Again we say thanks. We appreciate your support.
- Fernhill Soccer Club
Thanks very much for the photos! The area is looking excellent - a huge improvement on the original !! I appreciate all your team's efforts and hopefully we'll be able to successfully maintain the turf until it is well established!
- Lile, Keiraville
Fantastic , I bought it online Wednesday and it was delivered to my door on Friday, doesn't get any better than that. Thanks
- Warwick, Goulburn
Thank you for a quick and professional job at our school.
- Mark, Warilla High School
Just like to say a big thanks to Marcus Josh and Jed, all very professional, courteous with nothing being a problem, a job well done and another happy customer,will not hesitate to recommend you guys.
- Kevin and Florence Handford, Port Kembla
These guys were awesome! Nothing was too much to ask, Thanks guys
- Susan, Tapitallee
Both Marcus & Joe are very professional and know exactly what they are doing; their friendly personalities and workmanship makes them a credit to your company.
- James, South Coast NSW
Just a quick note to thank your guy for a great install - we had the perfect weather for laying (rained all day !!!) Looking a treat and I'll be in touch for more just as soon as this lot is established.
- Michael, Tallong
I would just like to thank you and particularly Jed and Jamie who worked their butts off today, and have done a fantastic job turfing our front lawn. Your whole operation is totally professional and we could not be more pleased with the end result. Thanks again.
- Tony & Kay, Sutherland
Thank you for your help in the installation of our new turf – I am really happy with it and amazed at what a difference it has made to the backyard. Your company made everything so very easy, I will certainly be recommending you. If ever I need turf laid again Turfco will be the first company I turn to.
- Margarethe, Shellharbour
Nathan, Josh and Brendon were a delight to deal with and did a fantastic job.
- Patrick, Illawong
Thank you so much for your professionalism and attention to detail with the supply and installation of our Sir Walter at our newly built house. It has totally transformed the look of our home and has provided the finishing touch it so desperately needed.
- Tim McGoldrick, South Nowra
We were very very happy with the service we received, everyone we were involved with were courteous, polite and professional. Would definitely use your company again in the future.
- Karen, Mt Pleasant
Hi Marcus & Jed, thanks again for your work, we really love our lawn!
- Gary, Berry
I just want to thank yourself and Marcus for everything and to the guys that did the job, they were fantastic and did a great job.
- Melinda, Renwick
Thanks Marcus! I have to say you and your team are one of the most professional trades I have come across and the lawn looks great!
- Belinda, Greenhills Beach
Thank you Marcus & Joe for such excellent customer service. Marcus gave us good advice on what turf to use and had no problems coming to offer his advice a second time to help us keep to our budget. Joe and his team were polite, friendly and efficient and did a terrific job on our very large backyard. It looks amazing. We've mowed it twice now and it looks like it has been there forever.
Jed and his buddy are wonderful. You guys are a real credit to Turfco.
- Robyn, Greenwell Point
The new lawn looks great! Thank you very much the boys did a top job.
- Matt, Wollongong
Product arrived with good grass growth and a nice root mass. Please pass on my thanks to your team.
- John, Jim's Mowing, Kiama
Joe, Scott and the team did a great job yesterday and despite having all four seasons during the afternoon, we smashed the turf laying records and got the job done.
- Jeff, Kangaroo Valley
Turfco did an amazing job at my place and now I want to repeat it!
- Reece, Hyams Beach
Thank you for the great job your guy did on Wednesday. I recommend you guys to everyone. Thanks heaps!
- Mick, Lake Heights
Just a quick message to say a big thank you to the driver who delivered the Turf on Saturday. He placed the turf in positions that made it easier for our guys to lay the turf. Thanks again.
- Ann, Surf Beach
Our lawn is looking great, I'm really happy with it; I never thought I would be a lawn person but turns out I am!
- Mick, West Wollongong