3,061. Mixed Species in a Vineyard That Was Seized by Force

Hilchos Kilayim 5:10

Let’s say that person X seizes person Y’s vineyard by force and plants mixed species in it. If person Y hides from fear of person X, the produce of the vineyard is consecrated under Biblical law; this is so even though person Y has not given up hope of reclaiming his vineyard. If person Y doesn’t hide from person X, then the produce is only consecrated under rabbinic law; this is true even if person Y has given up hope of reclaiming his vineyard.

Hilchos Kilayim 5:11

If the wind uproots the branches of a vine and moves them onto grain, they should be removed from there immediately. If one is prevented from removing them because of circumstances beyond his control, the produce remains permitted and is not sanctified.