Rock Star - planting on rock demo by Simon Jones
Simon Jones gave a demonstration about an alternative way of planting bonsai on rock. There are two main types of rock-planting. A single bonsai planted in a "root over rock" style represents a tree where the roots have become exposed over the years due to erosion or the surrounding land. The other type is where a number of small trees are planted on a much larger rock to give the impression of trees growing on a mountain.
The kind of rock that is used in the mountain-scene is usually a very porous type, such as tufa, as the trees roots need to be able to grow into it and "cling on". However, Simon decided to try a new design: using slate.
He fastened four pieces of slate together in a "fan" shape and then planted a number of small junipers between the slate pieces at various levels. The edges of the spaces between the slates was built up using a high-clay soil and covered with moss. Then a porous soil mix was used to fill in the remaining space where the trees' roots would grow.
The finished planting was very effective and will only improve as the trees become established.
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