Hello Dear,
i got a similar cedar but cedrus libani 3 years ago, I don’t feel comfortable to tell you what to do as a beginner but i can tell you what i did wrong, what i did right (in my opinion) and you choose from the list.
Right:
-Took my time to decide what to do didn’t touch it for a month, it took me whole season to prune unwanted branches, sometimes a branch a week.
-checked the nebari first or else it was doomed cause it had only one possible front.
-did not shorten branches i want to keep until deciding final silhouette.
Wrong:
-Went to the traditional triangle shape of bonsai by the rules (many other options)
-Removed leaf clusters close to the trunk to have the bare branch then canopy concept, dont do that, closer the canopy to the trunk the more mature the tree will look (just like that video of Ryan).
-Jinned branches too short and at the wrong angle, train branches you want to jin the same direction as other branches before you jin it and leave them long, you can always shorten it later.
side notes:
-Never bare root, I killed many.
-don’t know about atlas but libani never backbud from old wood, only buds from clusters that already has needles on, not even from old clusters without needles.
-full sun.
-Your tree trunk has better taper taper then mine so you can go taller but you have less branches to choose from.
-You can go with it’s natural look (although hard to achieve on small scale) or any other species characteristics (needs much wiring, everything will grow downwards), i have many atlas cedars around me I’ll send you pics of some monster ones soon.
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