Removing Fescue/Ryegrass from Centipede Lawn: Timing and Method

Managing Winter Grass Competition in Centipede Lawns

A homeowner in Seneca/Clemson, SC, seeded TifBlair centipede grass but finds fescue/ryegrass (planted by the builder for erosion control) competing heavily. The invader has tall, stalky blades with shiny leaves.

Recommended Approach

Wait until mid-winter, after a killing frost puts the centipede into full dormancy. Then spray the winter grasses with glyphosate (Roundup) or similar herbicide. The dormant centipede will not be damaged. This may require multiple applications. Pre-emergent herbicides next fall/winter will prevent recurrence.

Concern: Warm winters may not provide sufficient killing frosts for this method to work safely.