Isaías 37:30

For two years normal agriculture would be impossible around Jerusalem, but God would cause the land to produce enough to sustain the inhabitants. Probably the two years of interruption resulted from Assyrian military activity in the region. Fruitfulness has always been God’s blessing on those who trust Him. Then the third year, planting and harvesting as usual would resume. It was particularly unusual that the Judahites would be able to plant vineyards and eat their fruit shortly after that because it often took several years for new grapevines to yield a crop.