i like your logic ... dont kill it with too much love ...

first.. media is a water management system .. retaining what the tree needs and shedding excess .. what exactly are you seeing with the tree.. that makes you think the media is failing ... if its not failing. and you are just imagining a problem.. then it might be too much love ...

second.. is this the proper time to be repotting an A in a pot ... i dont know that answer ... hopefully others will chime in .. might matter if this is a houseplant.. or outside for summer ... and if outside ... is it in shade ... dont put a new transplant in sun until it can deal with that ....

how about a pic.. just so we can understand the scope of this... 8 foot tree?? .. 8 inch???

and..btw.. will you be using a bigger pot ... and is it requisite that you bare root it ...??? .. repotting without bare rooting is much easier on the stresses ... if i were doing such with a tree .... i would bare root in dormancy.. but i dont even know if As go dormant.. hence my comment above.. re: timing ...

ken

Repotting will be the very best thing.

The key is going to be keeping the roots moist at all times! This is imperative.

So, prepare your mix, and make sure that it is well hydrated - soaking the bark ahead of time is probably the easiest means of doing this. 511 is what I use, and it's great, but feel free to add in a little extra grit such as pumice or lava rock, even a little charcoal or Turface would be good. You won't be dramatically modifying the drainage or moisture retention, per se, but this additional grit will make the mix a little more durable for the long run.

When you work the old mix away, use a bucket or tub. Soak the rootball for half an hour, if needed, and slowly free the compacted mix. If the roots are bound, slice off the bottom inch or two of the rootmat, and loosen things up. But keep that rootball soaking to reduce shock.

Fill in the container, work the fresh mix all into the roots, and then water in to the new container. Put the tree in the shade, avoid wind, and keep the mix uniformly moist with lighter daily waterings for 3 - 5 days. You might even put the container in a driptray, water, let it sit for half an hour to ensure saturation, then dump the excess water.

I repotted mine June 9, 2019, and I had some problematic roots, as you can see. I sawed off the bottom 2 inches. I kept the tree hydrated after repotting, and it never skipped a beat. The second pic is the tree three weeks later.

brilliant greenman ....

to clarify... you work with moist media to start with.. not relying on moistening it after the plant is potted.. correct???

Thanks, Ken.

Yes exactly, when I make the mix, the bark is typically moist when it comes out of the bag, and the potting mix is slightly moist, too. I mix the ingredients in a wheelbarrow, add some hose water, mix again, and keep adding a little water until the moisture and consistency is just right. Keeps the roots happy, and also reduces "settling" when I pot the plant, since the mix is already nicely bound.