Hi.Personally I prefer this treatment in starter stock/seedlings.
In pine cuttings I find it very beneficial.The best thing for a pine seedling cutting is to have roots very close to trunk...the initial root density anyway.
Since these pines will be put into a smaller type bonsai pot,they will handle any root pruning quite well.On the other hand if you get massive roots to swell up by letting them run from trunk ,when you cut back to fit in your bonsai pot,it will be quite the drastic root pruning and could very well stunt the tree very hard a couple years.
Here is a 6 mnth pine seedling with dense roots only 1/2 inch from trunk.
I am totally for density big time at a very early age.
And makes very vigorous,so when these do push root growth it will be massive from all directions........more roots more power to uptake all the bio-stimulants.In a smaller package too if need be.
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