Never did any that thick. Maybe, but I would think it would take a while to root. But idk for sure. I think it is best if the shoots aren't rigid though. Good luck.
if u are using a powdered cloning soulition that will plug up the hollow stem and they will still root. im not sure with liquid or other methods of cloning and hollow stems but the powder worked for me with hollow stems.
Well all this begs the question why would you do it. The large clones will not have enough water uptake to provide for transpiration and will wilt and probably die or in the best case be shocked badly and will be slow to come back. Just take top clones about 4-6 inches and trim the leaves back to 1/2 length and then flower the big plants while the youngens veg. Good luck anyway,
HM
That diameter your best chance is air layering , easy to do on that large scale and more reliable.
The hollow stemmed awkward ones can usually be sliced at 90 deg through a stem node , solid base then and less rotting , rooting powder plug proved unreliable but certainly helped a lot.
As the others have said use air layering. I routinely take 24 inch clones by air layering. It can take quite a while, I'm just now getting roots on some 24-30 inch Train Wreck branches I prepped over 6 weeks ago.
Here is how I do it.
What I use:
Tomato pucks from walmart (they are 3 times the size of hydro store pucks.)
Saran wrap
rooting hormone (gel is easier to use in this application)
string or twine
turkey injector (30 ml syringe with long steel needle on end)
Pre prep
Soak peat pucks.
Cuts pucks down one side so it looks like a hot dog bun. tear of piece of saran wrap 2.5 times as wide as puck is tall and fold in half. You should also precut some 1.5 foot lengths of string as most of the work is done one handed.
Clone process
I slice the stems to expose rooting layer, and apply rooting hormone. Then I take the puck and put it around the area I just prepped and hold it tightly. Make sure there is excess plastic wrap below the bottom of the puck. this will act as a resevior making it easier to transplant into hydro. (some times I will put root gel in the bun too)
Then while still holding the puck with one hand I grab the saran wrap and stretch it super tight 2-3 times around the puck. I find you have to hold the saran wrap with the thumb on the hand that is also holding the puck. Then I hold the saran wrapped puck in my non dominant hand and tie the string around the saran wrap and branch below the bottom of the puck. I do a few tigjht wraps aroud the puck from the bottom up to the top and back down again and tie the string off.
The clone is now prepped. The only thing you will need to do now is feed it until roots show. To feed I use the pre-mentioned turkey injector. I just poke into a few different spots and inject my regular full strength feed. I find until roots are visible I usually only have to moisten them one a week or so. When they start drying out faster I know the roots are coming. Once the roots break out of the puck and start fishboning and sending taproots to the rez pocket we created it is ready to cut.
I just changed over to DWC buckets and using this method I usually get taproots peeking out of the net pot in 4-7 days.
Thank you doobie ninja!
Your use of pucks is most interesting as most use rw....your clone sizes inspire my curiosity to try your method!
Gotta love the Saran wrap too!
DN,s description is spot on , find rooting times are usually nearer two weeks on a young healthy plant , increaseing age and length of flowering raising this to a month or more.
One detail , removal of top layers has to completely cover around the stem , if not it can take far longer and have seen normal shoots instead of roots a couple of times in many layers , common propagation method with many non canna plants.