How does Gatsby’s gardener help prepare for Daisy’s visit?

This is a rather touching detail in the novel. Gatsby is meeting Daisy for their "reunion" at Nick's house. Gatsby has a gardener and his own grounds are perfect, "a well-kept expanse" (87). As Gatsby and Nick discuss Daisy's upcoming visit, Gatsby views Nick's grass quite critically, believing Nick has a "ragged lawn" (87). Gatsby wants everything about this visit to be perfect, and he tells Nick he wants to get the grass cut. He apparently sends his gardener to Nick's house. On the day of the rendezvous, as Gatsby nervously awaits Daisy, Nick assures him, "The grass looks fine"(89). Gatsby also sends over a veritable "greenhouse" (89) of flowers and vases for Nick's house so it looks beautiful for Daisy. Nowhere does the novel explicitly say these were done by the gardener, but it was almost certainly the gardener who undertook these tasks.