Thuja occidentalis progression
This is the first large Eastern White Cedar I collected. After four years of growing, the foliage mass was finally ready for some real work and this year it has gotten a lot of attention. In July it was thinned and roughly wired, and today it received its second and final thinning for the year.
I think this tree is actually two separate trees that have been growing together for a long time. The second trunk on the right is growing towards the back, and I’ve always toyed with the idea of removing it since it seems out of place. David Easterbrook and Marco Invernizzi both advised me not to remove it, and now I am starting to understand why. That secondary trunk provides much of the depth of the tree and without it I would be left with something very two-dimensional.
It will be difficult to find a traditional bonsai container that works for this tree. I’ve got some ideas for the future planting, but it will not be easy to pull off. The final planting will determine which of the large jins I end up keeping, if any. If I can sort it out next spring, this tree might be ready to be shown in Fall 2015.

As collected Fall 2010. Note the fist-sized rock lodged in the base of the trunk which had to be cut out with a die grinder.

Summer 2012, completely barerooted to remove the toxic muck and repotted into a much smaller grow box.

Summer 2013. Some major pruning and coarse wiring was done this year to open up the foliage and set the basic structure of the secondary branches.

Today after another round of thinning and minor adjustments. There is still a fair amount of floppy foliage but that is gradually being replaced with tighter growth or removed entirely.
Thuja occidentalis Initial Cleaning
This large Thuja was collected in Spring 2013 and this year has been growing well enough that I have started some basic work. In the first year of collection, I try to do absolutely nothing to a tree – not even move it around the yard. Cleaning work like this invariably involves bumps and vibrations, so I don’t do it until the tree is obviously strong and established in the grow box – typically the second year.
This is not a thorough cleaning – just the removal of bark that come off easily, getting piles of detritus out of cracks and crevices, and cleaning the deadwood with water and a toothbrush to get rid of algae. After this it is easier to study the tree and identify the path of the live veins. As the live veins swell up over the next few years, they will be defined further.
The thin dead bark that is really stubbornly adhered to the deadwood will gradually be picked at over the next few years. Removing it right now would require aggressive scraping or rotary brushes that would ruin the natural texture of the ancient wood. I’m estimating this tree won’t be show ready for around ten years, so there is no point in rushing things. Cycles of wet-dry-freeze-thaw will aid the gentle removal of the bark.
Next spring it will be bare rooted and repotted into a much smaller pot or box. Like most collected Thuja, designing this tree will be a serious challenge. Semi cascade seems like the obvious direction but close examination reveals that there is no easy solution.
Montréal Bonsai Bazaar Saturday August 23rd
Matthiew Quinn from Bonsai Quinn asked me to share the information about the upcoming Bonsai Bazaar being held by the Society of Bonsai and Penjing of Montreal.
See here for more information about the Bazaar, or click the image below (one of the excellent larches that will be for sale). Montreal has a wealth of bonsai talent so this would certainly be worth the trip!