AusBonsai

Some may be interested to see a technique usually used with deciduous trees adapted to pines.
I threaded some young pine seedlings through holes drilled in metal discs November 2018

They have since been fed and watered well and have grown significantly. I can see that one in particular has thickened a lot. Certainly way bigger than the hole in the disc now so I thought it was time to check on what was happening.

New roots have grown above the disc as expected, Not yet all the way round the trunk but certainly a good crop so far. I could not see what's happening on the smaller trunk as there's too many roots from the larger one in the way. I'll have a better look at spring repotting.
It is just one more way to get improved nebari on pines.

shibui wrote: ↑April 16th, 2020, 9:34 pm Growing new roots on pinesQuote shibui
by shibui » Yesterday, 9:34 pm

Some may be interested to see a technique usually used with deciduous trees adapted to pines.

After seeing your earlier post on this technique I applied it on two fraxinus seedlings into a single hole. My intention was to get a better nebari and form a twin trunk at the same time.

I put two seedlings through a single hole, the trunks are now about 8 mm in diameter and have surface roots above the plate.

Thanks for continuing to provide the information you do .

Interesting post.
I have only ever seen this done with seedlings so I am curious if anyone has tried it on older stock and what the results were.

The same thing should work with larger trees. The problem is threading a larger trunk with branches through a little hole. i have seen some people threading trees through CDs. The larger hole would require a larger trunk or more growing until the trunk gets constricted.
The wire tourniquet that some people use to layer trees is effectively doing the same thing. It just does not give a horizontal surface to keep the new roots flat.
Even ringbark method for layering is doing a similar thing to achieve a similar result.
I'm sure there are other ways to constrict trunks to force new roots.

Ive never seen this technique before. Ive used the wire tourniquet before and will try rhis one day. Thanks Niel you have a lot of valuable knowledge.

Greg