Can using Rooting Hormone be an issue of Kilayim?

 

Question:

It’s common to use rooting hormone when growing new trees from cuttings. Now the question is, since some hormones are made naturally by grinding up arovos (Willow) – is it considered kilayim.

If say I dipped a cutting (a cut of stick branch, which will become a new tree) into that ground of arovos solution. Is it considered kilayim?

 

Answer:

You should refrain from doing so even if you are planting a non-fruit-bearing tree unless the willows have rotted or decomposed to the point that they cannot grow any longer.

 

Sources:

רמ”א יו”ד סי’ רצה ס”ו. תשובת חת”ס שם סוס”י רפ”ז ושם דצ”ע אם א’ המינין ירקב לאחר זמן. וראה בתשובת כת”ס סי’ קסז. וכ”ז באם ירקב לאחר הרכבה, אבל אם כבר נרקב, אינו בגדר עץ וכעפר בעלמא הוא ואין חשש.

 

 

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