Q: How to kill nutgrass in azalea beds without harming the shrubs?
Yellow nutsedge only: Bentazon (click for sources)—spot-spray emerged sedge, not over-the-top.
Both yellow & purple: Imazaquin (click for sources)—check label for azalea safety. Halosulfuron (click for sources)—best control, labeled for established woody ornamentals.
Key: Both are root-absorbed; irrigate after application. Tubers dormant up to 2 years—persistence required.
Resources: Nutgrass Control in Landscape, Nutgrass Identification, Nutsedge & Tooth Decay.
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