This is a harvest of grapes. This can be made explicit. Alternate translation: "Before the grape harvest" (See: [[rc://en/ta/man/translate/figs-explicit]])
It can be stated clearly that this refers to blossoms on grape vines. Alternate translation: "when flowers have finished growing on the grape vines" (See: [[rc://en/ta/man/translate/figs-explicit]])
Yahweh will cut off the branches before the grapes can ripen. Alternate translation: "Yahweh will cut off the branches with knives before their produce fruit" (See: [[rc://en/ta/man/translate/figs-explicit]])