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Reducing primary branches on coast live oak

February 22, 2019 by Jonas Dupuich

Last spring I brought home a few coast live oaks. I repotted them in early May and found that they responded well to the work (see “Repotting out of season“). Here’s what one of the trees looked like last week.

Coast live oak

I did, however, notice that most of the new growth was on the top half of the tree. Many of the lower branches had died or become weak since the repotting.

Strong growth near the top of the tree

Dead branch lower down

From the side, it’s easy to see that the lower, back part of the tree has become weak.

Weak area

Because many of the old primary branches were long and straight, and because the new shoots were concentrated near the apex, I decided to significantly reduce the primary branches.

After reducing the primary branches

If all goes well, the tree will produce new shoots from the trunk and from the base of the remaining branches. I can’t say that I have strong expectations about how the tree will respond as I haven’t tried such an approach with coast live oaks, and when I’ve done this on related species like cork oak, I made sure to generate lots of healthy roots before getting started.

I’m curious to learn what’s possible with oaks so I took a similar approach with several other trees. I’m looking forward to seeing how they respond. My current guess is that plenty of shoots will emerge from rough areas on the trunk. I don’t expect as many new shoots to emerge from the smooth areas – the places where I’d most like to see them – but I’m hopeful there will be a few. Will report back when I know more.

Related Post

Repotting out of season – bringing new trees into the garden

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Filed Under: Bonsai Development Tagged With: Coast Live Oak

Previous Post: « Refining cork oak – step two
Next Post: Working soil into the roots below the trunk – repotting field-grown satsuki »

Reader Interactions

Comments

  1. Duncan says

    February 23, 2019 at 7:13 am

    My vast experience with coast live oak tells me you should get an explosion of new buds and shoots from everywhere including near the ends of healthy cut branches. But I also use a much more aerated substrate mix then you it appears.

    • Jonas Dupuich says

      February 24, 2019 at 11:04 pm

      Thanks Duncan – will look forward to seeing how the trees respond!

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