I have a Chinese Elm bonsai. The tree was doing fine, sprouting many new twigs in the last month or two. After the growth slowed down I decided to repot the tree, because the original soil was too slow to dry out and also because the roots were starting to fill the pot.
I used something called Terramol as the substrate, it’s supposed to be something like Akadama. I didn’t mix it with anything. (The supplier says it can be used as is.)
I had to trim some of the roots so that the plant would fit neatly in the pot. I was very careful doing it, only trimming a small part of the roots.
I think my watering routine should be fine – I always water after the top part of the substrate gets sort of dry, and I keep pouring until the water comes out through the drain holes.
But after a week the tree looks tired and wilted, some of the leaves are turning yellow. Is this expected after repotting, or have I done something wrong? If I screwed up, what’s the best way to help the tree?
This is how the tree looks now, after repotting once more into a mix of Terramol (two parts) with grit (one part) and potting soil (one part):
And this is a detail of the pot & substrate mixture:
Update: After a month or so after repotting the yellowing stopped and the plant started to look happy again. This is how the tree looks today: