After wanting a coast redwood, Sequoia sempervirens, for many years, I now have one in my collection. As the first order of business is to get it healthy, I’ve been feeding and watering heavily this year. Just in the past two months, it’s put on a lot of new growth.
Coast redwood
It’s still too early for wiring or styling, but I was able to do some cutback while the tree continues to gain vigor. I did the cutback during a recent Bay Island Bonsai workshop. Boon suggested cutting back to branches with at least two growing tips, so I did that. We also talked about the kinds of growth redwoods produce. At a glance, it’s easy to see where last year’s weak growth stopped and this year’s vigorous growth kicked in.
Tiny leaflets from last year followed by this year’s more vigorous growth
Looking closer, one can see that redwoods actually produce two kinds of growth – the flat leaflets in neat rows or radial leaflets that are a bit larger and more spaced out.
Radial leaflets below, opposite leaflets above
Here are the two kinds of shoots side by side.
Different redwood shoots
The main thing to know about the different shoots is that the radially distributed leaflets indicate more vigorous shoots. Below is a shot of a branch that shows a vigorous shoot at the tip of the branch, strong growth from this year on the sides and last year’s smaller leaves in the branch’s interior.
Redwood branch
One common technique for training redwood is to clip leaves in half. As redwoods cannot produce buds mid-leaf, this approach pushes growth further back. This isn’t recommended for branch refinement as the best outcome from this approach is lots of back buds that over time can produce knobs. Worst case, weak branches can die if they don’t bud back.
Note previously clipped leaf (yell0w) and new growth emerging from the base of the branch.
I put the tree back on the bench after minor cutback and will see about wiring when the tree produces strong growth in the tree’s interior.
Redwood – after cutback
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Paul says
July 10, 2015 at 6:02 amDo you know if your observation hold for “Dawn Redwood”.
Frank Kohn says
July 10, 2015 at 6:30 amHow about Bald Cypress…. could it work on them?
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mcktextiles says
July 10, 2015 at 3:50 pmSo what did you cut Jonas? How did you make your decisions? I have found redwoods to be far less predictable in their growth patterns than pines and maples, for example. Or maybe I just haven’t figured them out yet. Please provide more clues.
Jonas Dupuich says
July 10, 2015 at 4:16 pmGood question about about bald cypress and dawn redwood – they are both similar to coast redwoods in that there are elongating shoots and leaf shoots that sprout from the sides from the elongating shoots.
As for what I cut, I removed branches I didn’t need (a 2nd apex, areas with 3 or more shoots growing from the same spot, weak or dying shoots with no new growth on the branch tips, and shoots coming from the soil or low on the trunk) and shortened long branches in cases where I could cut and still leave two growing tips. The idea was just to thin at this point. I’ll say more about cutback when it’s time to start developing the branches.
Chris says
July 10, 2015 at 6:05 pmI’ll be watching your results with interest. I’ve got a number of coast redwoods here in western NY, I can keep them pretty healthy and growing but haven’t figured out exactly how/when to prune. Everything I’ve read suggests they are tricky, especially when grown outside their normal range. Pruning at the wrong time or place, or when a branch hasn’t matured enough, often seems to result in the branch dying back and new growth sprouting on the trunk.
africanbirding says
July 11, 2015 at 12:11 amReblogged this on Wolf's Birding and Bonsai Blog.
bonsai eejit says
July 12, 2015 at 8:37 amReblogged this on Bonsai Eejit and commented:
Nice post Jonas, I found it useful as I have been playing with one of these for a number of years now with local knowledge available in this part of the world regarding this species.