Samaria was the metropolis of the ten tribes, called so from Shemer, who owned the hill: Omri king of Israel bought it, and built Samaria upon it. Mountains in many places are judged the most convenient places for vineyards, being free from shades, and most exposed to the sun. God promiseth them a liberty to plant, and that they should enjoy their plantations, eating them as common things, which they could not do till the fifth year, as appears from Leviticus 19:23-25. The three first years it was to be accounted by them as uncircumcised, that is, unclean; in the fourth year it was to be holy to the Lord; in the fifth year they might eat the fruit of it, as any common thing that was not unclean, nor yet devoted and consecrated to the Lord.
Related Commentaries of Jeremiah 31:5
Jeremiah 31:5
5 Thou shalt yet plant vines upon the mountains of Samaria: the planters shall plant, and shall eat them as common things.b