How tall should zoysia grass be kept cut. I have a client that has it around 4 inches and I've been cutting it at that height for the last 2 mowings, and he said he wanted me to cut it back to around 2 inches. I told him it will turn brown and die out. I told him that I will cut it no lower that 3 1/2 inches, in other words, drop the deck a 1/2 inch on the next mowing. Its a postage stamp lot and I use a 21" push mower on it cuz so many landscape areas. This is a real PITA client. This time of year, I've only been cutting him every 3 to 4 weeks due to no rain. Thanks all!