Kilayim 4:7-8

Kilayim 4:7

If one planted a row of vines on his property and his neighbor did likewise, these two rows combine to be considered a vineyard. This is true even if they are separated by a private thoroughfare, a public thoroughfare, or a fence that is less than ten handbreadths tall (about 30 inches). If a fence of ten handbreadths separates them, they do not combine. Rabbi Yehuda says they still combine if one mingles the vines on the fence.

Kilayim 4:8

If a person plants two rows of vines but there aren’t eight cubits (about 12 feet) between them, he may not plant vegetables there. The same is true if there are three rows and there aren’t 16 cubits between them. Rabbi Eliezer ben Yaakov says in the name of Chanania ben Chachinai that even if the middle row is destroyed, leaving just the outer two, if there aren’t 16 cubits between them, he may not plant vegetables there. This is so even though only eight cubits would be required had he planted just those two rows in the first place.