Because thou hast forgotten the God of thy salvation
Who had been the author of salvation to them many a time, in Egypt, at the Red Sea, and in various instances since; and yet they had forgot his works of mercy and goodness, and had left his worship, and gone after idols; and this was the cause of their cities being forsaken, and becoming a desolation: and hast not been mindful of the rock of thy strength;
or strong Rock, who had supplied and supported them, protected and defended them: therefore shalt thou plant pleasant plants;
or "plants of pleasant fruit" F19, or "plants of Naamanim"; and so Aben Ezra takes it to be the proper name of a plant in the Arabic language, and which he says is a plant that grows very quick; perhaps he means "Anemone", which is so called in that language F20, and is near to it in sound; though rather, not any particular plant is meant, but all sorts of pleasant plants, flowers, and fruit trees, with which the land of Israel abounded: and shall set it with strange slips;
with foreign ones, such as are brought from other countries, and are scarce and dear, and highly valued; and by "plants" and "slips" may be meant false and foreign doctrines, inculcating idolatry and superstition, which are pleasing to the flesh F21.
F19 (Mynmen yejn) "plantas amaenorum [fructuum]", Piscator.
F21 So Vitringa.