Broadleaf annual that develops thick, multi-branched mats.
Perennial sedge that forms dense colonies.
By seeds and rhizomes, but primarily by underground tubers known as nutlets.
Broadleaf perennial with a shallow taproot and fibrous, expansive root system.
- Pennington UltraGreen Weed and Feed 30-0-4
- Pennington UltraGreen Southern Weed and Feed 34-0-4
- IMAGE All-In-One Weed Killer
- IMAGE Kills Nutsedge
Native to Europe, Quackgrass is easy to identify. It produces long, wide-leafed grass and the grass blades have a rough almost burr-like feel to them. The thick, white roots form deep, dense mats and these roots tend to break easily when pulled leaving pieces in the soil after the grass has been removed. Any pieces left in the ground will quickly re-grow into new plants.
The best defense is a good offense. Regular overseeding of your lawn will encourage a dense root system which will not provide space for Crabgrass to grow. Crabgrass is very rare in thick, healthy lawns that are mowed to a height of 3 inches (7.6 cm) this helps to keep the soil cooler thus inhibiting germination of Crabgrass seeds.
If you have had Crabgrass in the past, in early spring give the area a hard raking to dethatch it and remove the debris. You can then apply corn meal gluten, which will act as an organic pre-emeregent herbicide. Please note that since corn meal gluten is a pre-emergent, you cannot overseed your lawn until the fall if you use corn meal gluten in spring. The best way to organically control Crabgrass is to ensure that you keep your lawn mowed in late summer when the Crabgrass is putting up its purple seed stalks. This will prevent it from making seed for the future.