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Message: [QUOTE="NC_Uconn_Fan, post: 2774285, member: 3502"] Once the crabgrass has started to germinate, you need to kill it off or it will outcompete your desired grass. Frequent light waterings will help weeds more than your lawn. Your lawn likes to get 1" of water once per week, either by rain or irrigation, ideally all at once. Deep infrequent watering encourages deeper roots and keeps weed pressure lower. Hotter weather and or sandy soil may require more frequent watering. See how much your irrigation system is putting out by placing tuna fish cans through the yard, a full tuna can will equal 1". [/QUOTE]