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The relative growth and yield performance (tuber number and fresh weight) of 13 North American and European potato cultivars were assessed at a site in the Jordanian desert near Zarqa. These cultivars included `Spunta', which has long been grown in Jordan, and `Minerva' and `Ellona', which are new to Jordan. The other 10 cultivars were selected from a population of 130 cultivars that were ranked for salinity (NaCl) tolerance, using an in vitro single-node cutting bioassay. They represented top (4), medium (4), and poor (2) performers in salinized medium, in vitro. The field performance of the 10 in vitro-ranked cultivars generally validated the in vitro rankings. `Spunta' was the worst-performing cultivar.