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The basic problem here is that the cambium died along this line because the chop and removal of the branch that would have been poking one in the eye (in this view). Consequently, there was insufficient auxin flow along this line to keep the cambium alive. With maples, this death typically this...

acer shirasawanum that I've grown from seed Lubos Skoda pot

Ahhh, its good to be home. :cool:

You can get bare-root seedlings for $9 each from Arbor Day. Get a bunch of them so that you can eliminate the fear factor and hence get on with quickly building up you bonsai "toolbox" (when to, how to, what to do to make and enjoy)...

"Over watering" is a common problem after repotting - try not watering it so frequently. As far as fungus is concerned, you can spray a solution of 2 teaspoons 3% hydrogen peroxide (from the grocery/pharmacy) in a quart of water every few days, instead of cutting off leaves. This solution is an...

There is a thing called Polar Auxin Transport (PAT) in the cambium that defines 'up' versus 'down'. It is due to 'PIN proteins' in the cell wall being on one end of the cell. An 'upward' graft (as you show on the left in your diagram) the PAT flow is continuously down on the underside of the...

Indeed, it does depend, but considering a few fundamentals will remove a lot of the mystery. Root growth is stimulated by auxin which is produced by leaves and buds (above). Auxin is consumed (above) when new growth is extending Transpiration is a fundamental process of tree life. Water and...

Logically it seems like a possibility. It works above ground because of the interruption of the normal direction of the PAT stream which causes ethylene production that affects the enhanced radial growth. The PAT continues all the way to the root tips and so, similarly wiring a root ought to...

Good nitrogen nutrition is of key importance for budding.

My observations are that the rate of stem thickening (vascular growth) increases in spring to a maximum shortly after the occurrence of the summer solstice, https://www.bonsainut.com/threads/cork-oak-repot-experiment.10594/post-166869...

I agree with @Cruiser;s diagnosis. I have experience with it in Japanese maples and have only cured the infection (and saved the tree) by cauterizing the area of and around the fruiting bodies. By 'cauterizing' I mean hitting it with a butane torch (in the same fashion as one can see Maro...

It was done in by a sharp freeze in the early spring of '22. An interesting coincidence is that the landscape nursery where I bought it had a mature (15 feet or so tall) ground planted specimen that died that same spring. I concluded that azaras are not at all cold hardy (i.e., marginal USDA...

I didn't think to taste 'em 🤡

Witch's Hat (DHygrocybe conica) a first sighting for me.

Sugar lovers

Yes! You could nail a sheet of wood across the right side of the box to keep the pumice from washing out for the next few years, while the upper trunks of all will become a bit more vertical. Should the right-most tree develop some strong roots, you might choose to expose the right-most of...

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B but with even more/higher tilt, Then it would be like often seen along hillside logging road cuts, IMHO --> ultimately planted on a scoop or steep ramp slab

Oops! I've been using clear matt/flat acrylic sealers, not polyurethane. The principle difference, though, is that acrylics are water based whereas PU is oil based (nevertheless, lots of noxious volatiles are released as they cure, so one sprays/glops it on outdoors - I've been spraying)...

I prefer to coat the plot/slab with polyurethane as it also makes the item more durable.

Yes, it (is a maple) buds only at nodes. Repeatedly cutting at the same node (pollarding) will produce a profusion of buds, of course. Quite often nodes will have 3-fold symmetry instead of the usual binary opposition.

it does go brown for a number of reasons, it does bud back, but you've gotta cut it to make a bonsai. Cuttings readily root, so you can start a few hundred more while you make a bonsai of what you've got.

Kinda late now, but cut a petiole: a. platenoides (Norway maple) bleeds a milky sap; sycamore maple (a. pseudoplatanus) doesn't.

I haven't seen anything like this on an old log.