In Colorado, the best time to cut back ornamental grasses is late winter to early spring (typically February to early April), when still dormant and just before new growth begins.
This timing of cutting back ornamental grasses where we live allows the grasses to provide winter interest and habitat for wildlife while protecting the crown from cold temperatures.
How to Cut Back Ornamental Grasses
Cutting back at the right time encourages healthy regrowth, prevents rot, and keeps your landscape looking tidy for the new growing season!
What if I don't cut ornamental grasses back at all?
Leaving old growth doesn't damage the grass, but it doesn't look good with the new growth and is rather unsightly.
How to Cut Back Ornamental Grasses
- Wait for consistent warming – once the risk of extreme cold has passed but before new shoots appear.
- Use sharp shears or hedge trimmers – cut grasses back to 4–6 inches above the ground.
- Bundle for easier cutting – Tie the grass together before cutting to reduce mess.
- Compost or mulch clippings
Cutting back at the right time encourages healthy regrowth, prevents rot, and keeps your landscape looking tidy for the new growing season!
What if I don't cut ornamental grasses back at all?
Leaving old growth doesn't damage the grass, but it doesn't look good with the new growth and is rather unsightly.