In early spring, the first grape buds appear, followed by tiny clusters of grapes in March or early April. By late August, the grapes are handpicked from the vine, put on clean trays between the vine row and laid in the sun for two or three weeks to dry 1490 B.C. - History books first note raisins were sun-dried grapes. Between 120 and 900 B.C. , the first vineyards were developed.