I am not blaming the product only to mention it did not help in any way. I have been growing bonsai since the 80- I was in Omya in 1989 for the first world bonsai convention and had a long talk with Saburo Kato. I still wont claim I am a champion in bonsai growing, I did loose trees in the past, but most often I know or understand why. I can also mention a Bougainvillea who for the first time in his 20 years life did not bloom !.
Anyway, deleting post and banning people on Facebook because they cannot stand a critic should be mentioned here.
Cool Saburo Kati! One of my favorites. It’s because of his Ezo work that I have a nice starter 9 tree Ezo forest and multiple healthy cuttings.
As far as Probio carbon’s products go, I have have I am entirely opposite experience.
This we spring soaked all major bonsai, except the young azaleas, into a big vat of Probo carbon Danu. Also have been using probio carbon Biochar in the media of all repotted trees.
All trees are flourishing including some that were sickly. This includes multiple Kishu juniper, young JBP, JEB, JRP, and Paul’s scarlet Hawthorn second and third year cuttings and seedlings to name just a few of the smaller trees.
Honestly I can’t directly attribute the collections robust good health to Probio Carbon’s products, it could be our approach to horticulture

, but it’s very clear these trees have not been harmed in any means by use of their products and quite possible they have benefited.
JSYK we don’t silence opposite opinions here, we do have spirited conversations especially of media, fertilizer, and many other topics, but always strive for intelligent factual information.
So post away….and be open to opposing views and learning from others. It’s clear the forum may have a lot to learn from your experience.
That said I, for one, abhor trollishness and readily hit the ignore button to block all a posters conversations after the second snarky post.
Btw: Please enter your approximate location and USDA Plant Hardiness zone. Do this by clicking on your icon atop the page. Then click account details scroll down and enter this information. This helps others understand your key information when seeking or providing help.
So sorry for the longish post!
Cheers
DSD sends