Dallisgrass, Paspalum dilatatum, is a perennial grass weed that invades north valley lawns. Forming large, coarse, circular clumps as it matures, Dallisgrass is both unsightly and invasive. It's wide blade, low growing habit and a seed head that resembles a birds foot, make this pest easy to identify. As winter approaches, Dallisgrass becomes dormant only to re-grow the following spring.

Selective control of Dallisgrass is difficult. Products designed to selectively kill Dallisgrass while preserving surrounding desirable grasses are ineffective. Treatments need to be repeated at 7 - 12 day intervals and the targeted Dallisgrass often recovers.

We recommend Dallisgrass patches be killed with a non-selective herbicide in late summer and then sodded or re-seeded with cooler fall temperatures.