[laceylady]

Sumter County Extension Office agent Jim Davis says between 2am and 7 am. Zoysia green fertilization co. Says after 10 pm. Both times have worked well for me over the past four years. However, you will have to turn your Sprinklers on in the daytime two or three times a year just to walk around and check for geysers and to be sure all the heads are covering the entire area they are mean t to cover.