The basic premise behind developing material for bonsai is straightforward: first build the trunk, then focus on the branches. When building the trunk, encourage vigorous growth to thicken the trunk rapidly. When focusing on branch development, encourage less vigorous growth to ensure good branch density. Sounds easy, but there may be a bit more to it than that. When making the transition from trunk development to branch development, many bonsai will be quite vigorous. What are some good strategies for decreasing vigor? A reduction of fertilizer sounds like a good idea, but reducing it too much can weaken trees. And when developing pines, it’s important to keep them strong enough to withstand decandling. Reducing sunlight or water is another strategy, but to keep trees healthy, plenty of sunlight and water are required. The main thing is to avoid over-watering at this stage as it can lead to excessively long needles. One way to slow down pines is to shorten the spring candles. After the candles begin to elongate, simply break off some portion of the candle with your fingers. How much to break off depends on how long the candles are. Here’s an example on an 11 year-old black pine.
11 year-old black pine
The idea for this pine is to make a small-sized bonsai. As the trunk has reached the desired size, I can pinch the longer candles to reduce the amount of food the pine produces.
First grab the section to be removed
Then snap it off
I shortened the longest candles on this pine by about half, but left the shorter candles alone.
After reducing the longest candles
I could have reduced the longer ones a bit more, but I didn’t want to remove too much foliage at this point as I’ll have another opportunity to balance vigor come decandling time. Do note, candle pinching is distinct from what is commonly referred to as decandling. Whereas decandling is the removal of fully developed shoots in spring, pinching refers to the partial reduction of candles before the needles elongate. Once pines are further developed, it’s more rare for extra-long candles to develop as the vigor is generally better balanced in more mature trees. When these long shoots do show up, I snap them off.
Today marks post #600 – thanks for reading!
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