Poshy

Plant shrubs and trees, deciduous or evergreen; but avoid a poshy state of the land, if it be binding or clayey.

Source: wiktionary

I prefer a deep, rich loam, neither clay nor sand, but what the plough boys call "poshy land," sticks to the plough […]

Source: wiktionary

Trau, “The Morning Show”, Tele Reviews, page 27, column 5: Casting the top news developments, here and there supported by films, is Charles Collingwood, another down-to-earther despite the poshy aura about his background (Rhodes scholar, etc.) and the meticulous grooming. Abel, “Shirl Conway”, New Acts, page 55, column 5: Shirl Conway has been around in the poshier bistros and, after a European sabbatical, is back in the U.S., at the Maisonette of the plush St. Regis Hotel.

Source: wiktionary

North Ryde was open, real poshy people used to be there.

Source: wiktionary