The Lord caused his "servant" to perform all He determined to do for the vineyard. (5: 10.) The wild branches were grafted in and the covenant was suspended. The lines were broken. It would require a restoration of the covenant and adoption for the "natural fruit" to reappear. (5: 10.)
Labor was required from the Lord's servant as well as the Lord Himself. The vineyard required "digging about" and "pruning" and "nourishing" in an attempt to preserve the "root" to which it would be possible to one day to return. (5: 11.) These words tell us how constant the care has been, while scattered and wild remnants have apparently lay fallow without any fruit. Though the people have fallen, the Lord labors on.
Even when the digging, pruning and nourishing have been finished, and while the results are unknown, the Lord of the vineyard directs His servants to "watch" carefully, and to provide yet further "nourishment" when the damaged tree requires it. (5: 12.) Throughout, it is all done by the Lord's "words." He is not absent. He is diligent; ever watchful. He owns the vineyard and everything that is located there. Because it is His, He wants the best for it.
As to the young branches He wants to preserve, so it may be possible at last to return to producing good fruit, He decided to move them "to the nethermost part of my vineyard." (5: 13.) This allegory contradicts the idea of Jehovah as Lord of Israel alone. The Lord claims the entire vineyard, the world itself, as His. The notion of Jehovah being only a local Diety, as is thought by many scholars to be the prevalent idea at the time of Zenos' prophecy, is destroyed by this assertion of ownership over the entire vineyard. Even "the nethermost part" of the world belongs to the Lord of the vineyard.
Even as He relocates His people throughout the vineyard, He continues to view the scattered branches as part of the same, single "tree" He hoped to preserve. He explains: "[I]t grieveth me that I should lose this tree and the fruit thereof." (5: 13.) His intent is to continue to have covenant people, part of His Family, His own sons and daughters. Even though they are unable to continue in that relationship during the scattering, it is hoped ultimately it will allow Him to yet "lay up fruit thereof against the season." (Id.)
This purposeful and attentive effort was reassuring to Jacob's people. Though they were long separated from Jerusalem, and although the rising generation had never been there, this allegory assures them of God's watchful eye. The covenant of Jehovah with Israel continued to be with the scattered branches though they had been transplanted across an ocean and were living in an island of the sea. (See 2 Ne. 10: 20.)
The history of the world is the history of Israel. The events are supervised by a Lord whose purpose is to lay up fruit against the season of the harvest. As we grow ever closer to the season of harvest, the plan will need to result in the appearance of natural fruit again. Otherwise, the entire vineyard will be gathered in bundles and burned.