I would like to know if it is still a good time to decandle this little Japanese black pine. the second flush of candle is already growing. summer here where I live lasts till october.
Decandling two-flush pines is a special technique. If you do a full decandling in late spring/early summer removing all the new growth/first flush, you can not do it again.
Then you should leave the second flush of growth untouched.
If you have only shortened the candles you can do that again with the strongest parts of the second flush developing during summer.