There are wild potatoes in Mexico, but eating potatoes are generally cultivars imported from the Andes. They became popular elsewhere after Europeans with sailing ships took them around the world. Today they are readily available in Mexico, and on my last visit I was served a slice of raw potato on top of sushi.
The article "La papa: Apuntes sobre sus orígenes y su domesticación" says that the article "The domestication of roots and tubers in the American tropics" says that potatoes arrived in Mexico subsequent to Europeans, in 1519. According to fao.org, "some evidence suggests cultivated varieties were brought [to Mexico] by Spanish conquerors during the 1500s." The book "Strangers on Familiar Soil" describes La Pérouse bringing potatoes from Chile to California in 1786.
What does the evidence show? Is there a date by which Andean potatoes were definitely present in Mexico?