Rashi: Wheat, barley and grape-seeds that are planted together ¹ (simultaneously). ²

Sifsei Chachamim: The Pasuk in Vayikra forbids K'lai Zera'im (two different kinds of seeds) ¹ , whereas the current Pasuk comes to add Kilai ha'Kerem (two different kinds of seeds that are planted together with grape-seeds). ²

Yerushalmi Kil'ayim, 8:1: To teach us that, not only is seeding Kil'ayim forbidddden, but so is maintaining Kil'ayim that has already grown. ¹

Sifri: It implies that, besides the vine, one is planting two different kinds of seeds, so that one is contravening at one and the same time the La'av of K'lai Zera'im and the La'av of K'lai Kerem. ¹

Rashi #1 (citing Targum Onkelos): It means 'In case the (mixture of ¹ ) seeds that grow become Tamei (forbidden)'. ²

Rashi #2 (in Pesachim, 24b) and Targum Yonasan: 'In case what grows becomes Asur be'Hana'ah, and needs to be burned (Pen Tukad Eish)'. ³

Rashbam: It means 'In case what grows becomes forbidden like Hekdesh'.

Rashi: It means 'What the seeds subsequently increase (and ripen' - Rashi in Nachum, 1:10).

Targum Onkelos and Targum Yonasan: 'It means the mixture of seeds'.

Moshav Zekenim: Based on the Pasuk in Amos 2:13 "Ka'asher Ta'ik ha'Agalah ha'Mele'ah", "ha'Mele'ah means that one should distance diverse species from one anoher the width of a yoked pair of oxen (four Amos ? Bartenura Kil'ayim 2:6).

Oznayim la'Torah: It refers to the seeds ¹ and the grapes which become full as they grow. ²

Sifri: To preclude maintaining thorns in a vineyard from the La'av.

Sifra #1: It comes to preclude seeds that grew with the fertilizer or in the water with which the owner treated his field and seeds that the wind blew away from the area where he planted them into the vineyard. ¹

Sifra #2: It includes seeds that Reuven planted in Shimon's vioneyard, and which Shimon retained.

Pesachim, 25a: If the Kil'ayim has already been planted it becomes forbidden as soon as it takes root, whereas if it has not (where one is passing a plant-pot containing grain or vegetables through a vineyard, when it increases by one two-hundredth. ¹

Sifri: It precludes maintaining thorns in a vineyard - which are not generally eaten and do not therefore fall under the category of Zera. ¹

Sifri #1: It precludes seeds that come out in an animal's dung or in the water with which one waters the vineyard, and seeds which the wind scatters (not in the direction that the owner is seeding. ¹

Sifra #2: It incorporates seeds which Reuven planted and which Shimon is pleased to retain in the field.

Sifri: To incorporate a partial vineyard in the prohibition of K'lai ha'Kerem. ¹

Yerushalmi Kil'ayim, 7:2 #1: To incorporate somebody else's vineyard in the prohibition of K'lai Kerem. ²

Yerushalmi Kil'ayim, 7:2 #2: It implies that only what falls under the category of "Tevu'ah" is subject to Kil'ayim - to preclude grain that has grown to less than a third of its full height and grapes that have grown to less than the size of a white bean. ³

Yerushalmi Kil'ayim, 7:4: It precludes where one planted grain next to vines whose grapes are fully ripe, and by the same token. "M'lo Zera" precludes where one plants a vine next to grain that has fully grown. ⁴

Sifri: Refer to 22:9:2.1:2 and note.