the breeding of nettles - or, the overspreading of nettles, that is, a place overrun with them.
salt pits - found at the south of the Dead Sea. The water overflows in the spring, and salt is left by the evaporation. Salt land is barren (Jdg 9:45; Psa 107:34, Margin).
possess them - that is, their land; in retribution for their having occupied Judah’s land.