Root-Pruning a Mugo Pine – With A Few Surprises

During the repotting of this 60 year old Mugo Pine bonsai, we discovered something unexpected hiding in the roots. What should have been a simple root-pruning turned into a surprising lesson in bonsai care.

In this video, Tien walks through the full process of root-pruning and repotting a 60 Year Old Bonsai — from carefully removing the tree, inspecting the roots, and cleaning away the soil, to re-establishing the bonsai in its new pot. Along the way, he finds clear signs of past repotting… but without proper root work. The result? A fascinating glimpse into how shortcuts can affect a tree’s development.

This tutorial covers:

How to safely remove a bonsai from its pot
Identifying root-bound problems
Why proper root-pruning matters
Repotting steps for long-term tree health
Whether you’re new to bonsai or have been working with trees for years, this video is packed with tips and a few surprises you won’t want to miss.

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Chapters
00:00 - Introduction
03:50 - Removing Tree From Pot
08:35 - Root Pruning
20:09 - After-Care
21:44 - Repotting
23:16 - Bark Discussion
30:27 - Twin Trunk Design
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