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Decandling field-grown black pines

June 17, 2022 by Jonas Dupuich

One of the most fun stages of development is when the trunk has reached the desired size and the focus switches to improving branch density.

The black pine below was field-grown at Lone Pine Gardens in Sebastopol, California. For the past few years I’ve been slowing the tree down in an effort to develop shorter internodes and greater branch density.

Last week I pruned, decandled, and wired the tree. Here’s what it looked like before the work.

Field-grown black pine

Field-grown black pine

And here’s the tree after pruning, decandling, and thinning excess needles.

After decandling

After decandling

Once I saw the branch structure clearly, I figured it would be a good time to lower the primary branches. I quickly realized, however, that the first branch on the right side (shown below from the back) was way too heavy to bend with wire. I only needed to bend the first two inches so I attached a piece of rebar to make sure I could bend the branch right where it emerges from the trunk.

Ready for bending

Ready for bending

I attached a guy wire to hold the branch in place after bending and lowered it incrementally until I reached the angle I was looking for.

After lowering the branch

After lowering the branch and securing it with a guy wire

Here’s what the tree looked like after wiring the rest of the branches.

After wiring

After wiring – 18″

I did similar work on another tree from the same batch. Here’s the before and after.

Before pruning

Before pruning and wiring

After pruning and wiring

After pruning and wiring – 26″

The apex still has a ways to go so I left the main sacrifice branch and will let it grow freely for another year or two. Once the sacrifice branch comes off I can focus on creating the silhouette I want for the tree.

✕

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Filed Under: Bonsai Development Tagged With: Black Pine, Decandling

Previous Post: « Bonsai Development Series #26: Focusing growth in a single sacrifice branch
Next Post: Summer pruning young deciduous trees »

Reader Interactions

Comments

  1. Gary McCarthy says

    June 17, 2022 at 4:21 am

    SWEET base and trunk on that first tree!!!

  2. Keith Jarvis says

    June 17, 2022 at 6:34 am

    Jonas
    I’ve been looking for training instructions for Mikawa black pine since the growth habit is so different.
    Do I do the same as I do with regular?

    • Jonas Dupuich says

      June 17, 2022 at 8:39 am

      I can’t think of anything that’s fundamentally different with Mikawa – I treat them the same as the other black pines I work with.

  3. Pete Shirk says

    June 17, 2022 at 9:49 am

    Jonas, great job explaining and illustrating how to shape mature, stiff JBP branches. The rebar technique is useful and effective for stout branches and your photos show how to do it.

    Also useful is your illustration of sacrifice branches on tree#2.
    Thanks for posting such good instruction.

  4. Vance hanna says

    June 17, 2022 at 10:58 pm

    Jonas!
    Really a sweet job!
    Initially how long was the tree in the ground at Sebastopol?

    Vance hanna

    • Jonas Dupuich says

      June 18, 2022 at 9:08 pm

      Thanks, Vance! I don’t know when these were planted, but I’d guess they were at least ten years in the ground.

  5. Paul says

    June 18, 2022 at 12:38 pm

    What a great maneuver! Thank you for sharing your tips!

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