Cactus and Succulents forum: Euphorbia grandicornis (Cow's horn)

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Illinois (Zone 5a)
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Jen1973
May 23, 2018 4:33 PM CST
I have a Euphorbia grandicornis (Cow's horn) that is extremely root bound. It belonged to my father and I know that it was in the current pot for at least 4 years. I am attempting to re-pot and I am not exactly sure what the best method is. Trim the roots and re-pot all or cut away from main stem that looks dead and re-pot? (I am most bothered but what to do with all of the roots??)

Thanks for any help!
Jen


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Name: Thijs van Soest
Tempe, AZ (Zone 9b)
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mcvansoest
May 23, 2018 5:17 PM CST
Hard to get rid of all those roots. Am I correct in the assumption that those roots are mainly attached to the 'dead' main stem?

I am sure these will re-root if you start with the arm cuttings, but it would take time for new root systems to develop which means the arms would sit idle and/or deteriorate...

My approach would be to repot with the roots and see if there is a way of minimizing the appearance of the dead looking main trunk by shortening it to just above the highest alive branch...

It is what it is!
Illinois (Zone 5a)
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Jen1973
May 23, 2018 5:44 PM CST
Thanks for the advice. It is a unique plant and I want to nurse it back to good health!!

Smiling
Name: Baja
Baja California (Zone 11b)
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Baja_Costero
May 23, 2018 5:49 PM CST

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The main stem on these plants sometimes dies back, but the low-down branches will persist... this feature is especially evident in seedlings, where the main stem basically terminates when it branches early on close to ground level. I agree with Thijs' advice. You can restart the arms from cuttings but you may see the same thing happen afterwards to them. This is not a small plant in the ground and it tends to require some space in containers after a few years. I have never tried to trim the roots.
[Last edited by Baja_Costero - May 23, 2018 5:50 PM (+)]
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