Hawthorn stumps

Ahh... I see they do a 3-8mm...interesting.
Wonder if they will deliver to UK after brexit Scheiße bauen
 
I have used the 2-5mm. Good quality stuff.

Not sure about the size-distributions. I just toss all ingredients in a tub, mix nd sift to size. In the end each size-class has slightly different ratios of the components. I did realize in the 2-5 that it hang towards smaller sizes.
 
I have used the 2-5mm. Good quality stuff.

Not sure about the size-distributions. I just toss all ingredients in a tub, mix nd sift to size. In the end each size-class has slightly different ratios of the components. I did realize in the 2-5 that it hang towards smaller sizes.
I will definitely look into this thanks leather
 
How do you get on with the perlite? ... I tried it many moons ago and found it floated out the pots when watering... Its also terrible at holding any nutrition...
Not that Danish clay is much better...
It's all a hell of a lot cheaper than pure pumice tho which any real quality yamadori absolutely deserves
I find it ok. I've noticed it washes off the surface though. I've noticed the roots tend to cling to it more that the clay.

Is it better to use pumice with yamadori? I'm not sure what ingredients do what in a bonsai mix
 
Many growers use pumice for collected trees. The high air filled porosity seems to help promote new roots provided it does not dry out too much. Pumice cannot be over watered which probably also helps survival rates.
My collected trees and transplants from the grow beds seem to do fine in my standard bonsai mix - pine bark/sand mix so I think survival is probably linked more to care than the actual potting soil.
 
Root rot is more of an issue than drying out... I've collected a fair amount of trees and pot rot has been number 1 killer by far.
This is something I have been saying for years. Still people persist with taking as much soil round the roots as possible and stuffing the lot into a pot. We know that soil in pots is a disaster waiting to happen. We know that soil in pots encourages root rot but still they persist with 'keep as much soil round the roots' approach and battle root rot.
I collect lots of trees here. I shake off as much native soil as possible without damaging roots then shorten the roots to fit future bonsai pots and pot into good potting soil then keep them well watered. Root rot is very rare. Survival is high.
 
This is something I have been saying for years. Still people persist with taking as much soil round the roots as possible and stuffing the lot into a pot. We know that soil in pots is a disaster waiting to happen. We know that soil in pots encourages root rot but still they persist with 'keep as much soil round the roots' approach and battle root rot.
I collect lots of trees here. I shake off as much native soil as possible without damaging roots then shorten the roots to fit future bonsai pots and pot into good potting soil then keep them well watered. Root rot is very rare. Survival is high.
I like the idea of keeping a bit of soil for the beneficial bacteria.
 
I like the idea of keeping a bit of soil for the beneficial bacteria.
I agree with shibui, I'll keep some soil on conifers but on a deciduous I'll sacrifice loosing a few fine feeders just to get the soil off carefully with a hose and a chopstick.

Don't worry about microbes and bacteria too much...
It's oxygen and shaded sun your wanting.
After the summer solstice you could add a light dose of a natural feed to introduce microbes and bacteria if the tree is responding positively.

Note - never add man made feed to newly potted tree, it could burn up fine roots.
 
I understand the idea of beneficial bacteria and fungi at transplant. That does not mean we need a pot full of soil. If there are associated bacteria and fungi they will be close to the roots or actually in the roots. Washing the roots thoroughly might preclude some of the beneficials transplanting but just shaking most of the soil off will not. There will still be thousands of them adhering to the roots and the small amount of soil left. In the new, improved conditions of fresh soil with lots of moisture and air they will then breed hugely.
Even if the beneficials are removed at transplant it does not usually take long for them to recolonize pots. Mycorrhiza appears in pots of pine seedlings here within a few months of the seed germinating. Bacteria and fungi are very good at locating and colonizing suitable places.

As well as beneficial bacteria, etc there are always pathogenic organisms in soil. Keeping lots of soil around fresh pruned roots is a great way to help them invade the tree.
 
Note - never add man made feed to newly potted tree, it could burn up fine roots.
I think that's a lesson I've already learned. I was using westland growmore which seemed to do well but when I ran out I used a cheaper alternative which seemed to nuke a couple of my new trees.
As well as beneficial bacteria, etc there are always pathogenic organisms in soil. Keeping lots of soil around fresh pruned roots is a great way to help them invade the tree.

I was thinking of standing my trees on top of the soil and letting them root out of the pot into the ground.
 
I think that's a lesson I've already learned. I was using westland growmore which seemed to do well but when I ran out I used a cheaper alternative which seemed to nuke a couple of my new trees.


I was thinking of standing my trees on top of the soil and letting them root out of the pot into the ground.
We've all done it mate... Hard lessons to learn when we dream of every tree we own.
I honestly think bio gold is best, its just so expensive... I also gave them all a drink of multimite twice last year, I didn't harm them but need a few more applications to test again.
I can hardly lift the yamadoris once their wet so all mine are on ground, but really I suppose lifting them up an inch on roofing lathes and getting more oxygen under would benifit until first frost.
 
We've all done it mate... Hard lessons to learn when we dream of every tree we own.
I honestly think bio gold is best, its just so expensive... I also gave them all a drink of multimite twice last year, I didn't harm them but need a few more applications to test again.
I can hardly lift the yamadoris once their wet so all mine are on ground, but really I suppose lifting them up an inch on roofing lathes and getting more oxygen under would benifit until first frost.
I've been considering investing in a seaweed tonic. Is it a good investment?
 
Is there anything else that is good for encouraging root growth?

I've heard rhizotonic mentioned. Is this recommended?
A warm dryish spring like 2020 UK.
Letting the soil get on the dryer side before a good drink.
An open mix soil with plenty of oxygen.
Plenty of drainage holes in tub or pot.
Clean cut roots.
Rain water instead of tap water.
Plenty of green leafs on top.
No big chops on trunk or branches unless done in the autumn prior to collection.
Don't let let wife, kids and dogs near them 😂
 
I have not noticed any improvement in growth or survival of collected trees with seaweed tonic. There may be some value in these concoctions but I have not been able to measure it in my trees.
 
I have not noticed any improvement in growth or survival of collected trees with seaweed tonic. There may be some value in these concoctions but I have not been able to measure it in my trees.
I got my replies in this thread and the field maple one mixed up. When I said a 6 inch trunk and 12 inch pot. I was talking about these hawthorn with no root.
 
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