Bonsai Soil Mixes - Not all the same
Some time ago I waded into the 'deep end' of the Bonsai Soil Mix debate.
Visitors to The Australian Bonsai Gallery constantly asked about our bonsai soil mix so I thought I would share an article I wrote three years ago on this subject.
Feel free to comment and share your experience.
The health and vigor of the bonsai at The Australian Bonsai Gallery attest to the success of our bonsai soil mixes.
There are no tricky, hard to get ingredients here; most are readily available.
The big question we are often asked:.....
Q.... Do you use the same mix for all species of bonsai.??
A.... You must, firstly, know the characteristics of each ingredient of the soil mix; that is, knowing what they contribute to the health of the tree. Secondly, it is essential to know the horticultural needs of each species and how to match the quantities of each ingredient to the needs of the tree.
A quick example would be say.... a Swamp cypress would require a greater proportion of water holding ingredients than a Japanese Black pine.
Once you have mastered these skills you should be able to water your entire collection at the same time intervals.
Over the past few years Australia has seen higher than average rainfall and the need for a tailored soil mix has never been more important.!!! Over this period we have seen an increasing number of other peoples bonsai that have suffered from soils holding far too much moisture.
Usually the cause is soil mixes high in fine organic matter. This has a dual effect on the tree. Once wet the soil takes far to long to dry out; and, if left to dry out too much the soil becomes 'hydrophobic' and will not take up moisture. Both these effects are terminal for most bonsai.
The following image is a sample tray we have set up for our Bonsai Workshop students. Our students learn quickly how to prepare a good mix for their trees.!!