Austrian Black Pine Second Flush

I have an Austrian Black Pine (Pinus Nigra), which I decandled in June (first week). The tree is now pushing a full second flush. I noted in Ryan’s Nigra video, that the tree will push a 2nd flush of buds, which will elongate next season only.

Anyone else experience this?

I thought maybe the tree is super vigorous, but I reached out to the collector from whom I have the tree, and he said he sees Austrian Black Pines pushing a 2nd flush regularly. I assume this might be a subspecies?


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Hey Bandi,
My Austrian Black Pine also pushed a second flush after decandling. I was attempting to push back budding, and I got 4-5 buds at all decandled sites and no back buds. They have since pushed into nice healthy shorter needles. Seems to be acting more like a multi-flush.

I would like to know more about this as well.

I posted a question to Ryan in this week’s QA. I’ll follow up once i have an update tomorrow or on Tuesday.

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My notes indicate that Ryan stated that Austrian Black Pine behave a little like a multiflush, single flush short needle, or long needle single flush depending upon the state of development, ferritization, and stored energy. This what the stream dated 12 May 2020. I think I have seen a couple of articles by folks who seem to say similar things to Ryan on many subjects that that P. nigra can be treated like a true multiflush every 2-3 years if properly built up. I have gotten some true multiflush growth on one of mine in development in the past.

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I missed those nuances that it could act like all of those depending on the “state of.” I thought he was saying that Nigra has characteristics of all of those, but I didn’t catch that it depended on the vigor and timing. Thanks for clarifying. I look forward to continued learning

about Nigra. I have one that needs a lot of development for sure.

@MartyWeiser: as I recall he mentioned nigras being an outlier multiflush, capable of pushing out a 2nd set of buds after decandling (along with backbudding), which would not flush in the current year. You would have to wait for next year for the buds to push candles.
However seeing a full 2nd flush, just like on JBP this year surprised me a lot.

As an additional note, I reached out to the seller (he collects a lot of Nigras in Poland) and he mentioned that he has a lot of Nigras AND Sylvestris that regularly push a 2nd flush…must be something in the Polish waters…

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You can find a comment on the 2nd flush from Ryan in the 68th QA (min 36:19): https://live.bonsaimirai.com/library/video/forum-qa-68

In short:

  • Ryan has never seen this happen
  • 2nd flush could be due to an abundance of health or due to genetic traits (i.e subspecies of Nigra)
  • Next Steps: monitor additional back-budding

For the sake of progress here’s a new picture taken 2 days ago. The needles be elongating like crazy - this tree is super vigorous.

Just in case anyone in Europe is interested, the tree is from JackRostBonsai. Jacek (the owner) has some of the best conifer yamadori collection I have seen in Europe. Also he is an amazing guy :smile: Check him out

Here is a picture of one of the branches on my grafted Austrian Black Pine. I think it is a cultivar since the needles are only 5 cm long and curved and that is without any work to reduce needle length. I cut all of the strong and medium shoots back to <10 needle pairs on 10 June 2020 and then did a styling on 8 July 2020 where I removed about 2/3 of the lower branches and a whorl above what will be the new apex. As you can see I have both buds pushing from the cut site this year and buds forming at the base of this year’s growth. Most of the cut sites are like this although there are a couple with only buds at the base of this year’s growth. I did not see many back buds, but there are a few.