As well as not fertilized after it was laid. I do not know how it is done elsewhere. But over here, I treat newly laid sod with a liquid containing biostimulants, some NPK and micronutrients. Zoysia is also not a miracle grass that will grow even if it is starved. I get so sick of hearing that horse manure. If someone mentions thatch, Emerald zoysia will not thatch if it is kept cut at less than 3/4 inch with a reel mower.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738