Antolin from Greenwood Sc writes
Celsius WG Herbicide will not control poa annua (annual bluegrass). For warm season turfgrass, Certainty Herbicide is labeled for killing poa annua when actively growing. This post emergent should be used with a non ionic surfactant for best results. Please review our Poa Annua Treatment Guide for more information.
Answer last updated on: 02/14/2022