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This Spiraea started out as a cutting I took for my garden, around 1995. During the Winter of 2002 I lifted the plant to make room for some new bonsai benches and found it had an interesting base and a naturally shallow rootball with a good spread of lateral roots.
The tree was rootpruned and potted up into a shallow terracotta pot. The tangle of shoots were reduced to just 3 new 'trunks'
By June 2003 the tree had recovered well from its collection. Much of 2003 was spent repeatedly removing the many suckers that kept appearing at the base of the three trunks.
Thin spindly 'trunks' are typical of Spiraea, they are more of a shrub than a tree and don't normally produce thick trunks at all. During the Winter of 2003, as the Spiraea the tree had obviously recovered from its severe pruning of the previous Winter, it was planted back into the ground to try and thicken the 3 trunks
August 2005. Two years later and the tree has to be lifted again to make room in the garden! Not the best time to repot however, given the compact rootball this tree had previously, I knew I could get away with it!
August 2005. A few hours later and the tree is potted up into a shallow terracotta saucer having been bare-rooted. Though the tree was fine and continued to grow into the Autumn, this timing is not recommended!
As can be seen in the image above, with all suckers repeatedly removed (there were less and less each year), the remaining three trunks have thickened quite well over the past 2 years.