Nutsedge vs. Dallisgrass
Two common lawn weeds that look similar but behave differently. Learn how to tell them apart — and how to get rid of them.
Know Your Weeds
Nutsedge and dallisgrass are two of the most persistent weeds found in lawns and gardens across the United States. Although they share some visual similarities, understanding their key differences is essential to identifying and controlling them effectively.
Weed Profiles
Nutsedge (Nutgrass)
Nutsedge is a perennial weed with triangular-shaped stems and long, narrow leaves. It typically grows taller than surrounding grass and thrives in both sunny and shady areas. It reproduces through underground tubers called nutlets, which can sprout new plants.
Dallisgrass
Dallisgrass is a warm-season perennial grass with a similar appearance to Bermuda grass. It has a bunch-type growth habit with a dense cluster of leaves at the base of the plant. It reproduces through underground rhizomes, which can sprout new plants.
Key Differences
Stem Shape
Nutsedge has distinctly triangular stems — a reliable identification trait. Dallisgrass has round, flat stems typical of grasses.
Growth Habit
Nutsedge grows upright and taller than surrounding grass. Dallisgrass forms a low, dense bunch cluster at its base.
Reproduction
Nutsedge spreads through underground nutlets (tubers). Dallisgrass spreads through underground rhizomes.
Active Seasons
Nutsedge
Most active during summer and fall. This is when nutsedge spreads aggressively and is hardest to manage.
Dallisgrass
Most active during spring and summer. Early identification in spring gives you the best chance for effective control.
How to Control Each Weed
Controlling Nutsedge
Nutsedge can be controlled with post-emergent herbicides specifically labeled for nutsedge control. Apply after the weed has already emerged for best results.
Controlling Dallisgrass
Dallisgrass can be controlled with pre-emergent herbicides specifically labeled for dallisgrass control. Apply before the weed germinates for best results.
Act Early for Best Results
Both nutsedge and dallisgrass can be extremely difficult to control once established. Address these weeds as soon as they are spotted. Always follow the instructions on the herbicide label and check with local authorities and lawn care experts to confirm the best approach for your area.
