Negative commandment · Lo Ta’aseh #216 of 613
Not to sow grain or vegetables in a vineyard
שלא לזרוע תבואה או ירק בכרם
The verse · Devarim 22:9
לֹא־תִזְרַע כַּרְמְךָ כִּלְאָיִם פֶּן־תִּקְדַּשׁ הַמְלֵאָה הַזֶּרַע אֲשֶׁר תִּזְרָע וּתְבוּאַת הַכָּרֶם
“Thou shalt not sow thy vineyard with divers seeds: lest the fruit of the seed which thou hast sown, and the fruit of the vineyard, be forfeited.”
The Rambam’s words
Not to sow grain or vegetables in a vineyard, as [Deuteronomy 22:9] states: "Do not plant different species in your vineyard."
שלא לזרוע תבואה או ירק בכרם, שנאמר "לא תזרע כרמך, כלאיים" (דברים כב,ט).
Why · Sefer HaChinuch #548
To not plant forbidden mixtures in a vineyard
“It is from the roots of the commandment that G-d, blessed be He, created His world with wisdom, with understanding and with knowledge, and [so] He made and formed all of the forms according to that which it was fitting for its matter to be, to be designed [according to] the design of the world — and blessed is He that knows [this].”
Who & when
“And the prohibition of forbidden mixtures of the vineyard from Torah writ is practiced by males and females in the Land of Israel alone, and rabbinically even outside of the Land.”
Where in the Mishneh Torah
Hilchot Diverse Species הלכות כלאים