Hot answers tagged kilayim-forbidden-mixture
Kosher speciation Generally speaking, we have a rule that "kol hayotzei min hatahor tahor, vichol hayotzei min hatamei tamei" ("that which comes from a kosher species is kosher, and that which comes from a non-kosher species is non-kosher"; see Bekhoroth 1:2). Since this new species comes from kosher and non-kosher species, there would be several potential ...
The basic rule is that if the two types to be cross-grafted are similar either in the shape of their leaves or the appearance of their fruit, then it is permitted to crossbreed them. There are some exceptions to this, such as if the taste of the two fruits is very different. (Rambam, Hil. Kilayim 3:4ff) Applying this rule, then, to your cases: Rema (Yoreh ...
I'd asked Rabbi Hershel Welcher of Queens a similar question, about goats that were given a bit of spider genes so they would produce gossamer in their milk. He felt the concept of "zeh v'zeh gorem, mutar" applied -- as the spider genes would not have sufficed to produce an organism, such a goat is kosher. So the same should apply here.
The Rambam writes (Hilchot Kilaim 1:4) אין אסור משום כלאי זרעים, אלא זרעים הראויין למאכל אדם; אבל עשבים המרים, וכיוצא בהן מן העיקרין שאינן ראויין אלא לרפואה, וכיוצא בהן--אין בהן משום כלאי זרעים. The prohibition of Kilei Zeraim (mixed seeds) only applies to seeds [of plants] which are human food. Bitter herbs and other herbs which are only used for ...
The Rambam (Kilayim 1:3) and the Shulchan Aruch (YD 297:2) explicitly rule that the issue of Kilaei Zeraim (planting mixtures of edible seeds (except grapes)) only applies in the Land of Israel and a Jew can even plant his own mixtures outside of Israel on purpose.
The Chasam Sofer (Toras Moshe parshas Shemini) writes that the meaning of the Medrash (cited by many Rishonim) that the pig is called a חזיר because עתיד הקב"ה להחזירה לישראל - Hashem is going to "return" it to the Jewish people - is that the physiology of the pig will be altered to chew its cud (the Kosher sign that it currently does not have) and will ...
The Rambam (Kilayim 1:3) and the Shulchan Aruch (YD 297:2) explicitly rule that the issue of Kilaei Zeraim (planting mixtures of edible seeds (except grapes)) only applies in the Land of Israel and a Jew can even plant his own mixtures outside of Israel on purpose. So I think we can reason a fortiori that your friend is allowed to keep his vegetables when he ...
Rambam writes (Maachalos Asuros 10:11-12): ספק ערלה וכלאי הכרם בארץ ישראל אסור. בסוריא והיא ארצות שכבש דוד מותר. כיצד היה כרם וערלה וענבים נמכרות חוצה לו. היה ירק זרוע בתוכו וירק נמכר חוצה לו. שמא ממנו הוא זה שמא מאחר. בסוריא מותר ובחוצה לארץ אפילו ראה הענבים יוצאות מכרם ערלה או ירק יוצא מן הכרם לוקח מהן. והוא שלא יראה אותו בוצר מן הערלה או לוקט ...
A number of points: Kilaei Zeraim applies to things that grow from the ground. Mushrooms do not qualify. Kilaei Zeraim is forbidden only if you plant it intentionally OR if you leave it that after you find it and it grows to maturity. Kilaei Zeraim requires at least TWO different types of seeds to be planted in addition to the vine itself.
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