What factors cause the tree to increase in girth. observations of maples.
i currently have 3 maples - various random japanese varieties. one rescued from the exit of M&S one afternoon after being the last forlorn one left there - its was £4.99
1 - number of branches. the grafted plant has a lot of fine branches and foliage and was freshly repotted into good pottign soil - it has a vigorous root onto dwarf foliage. it was regularly fertilised through the growing season. fantastic growth on the trunk durign the season. i had pruned almost all the branches back 4 nodes fromt he tips - the two new shoots added about 4 inches this season and added a lot to the root branch thickness.
2 - number of leaves. the dwarf wins here with a tonne of foliage during the growing season.
3 - pruning. in these plants pinching and encouraging ramification durign the growign season seems to slow the plant down and reduce the growth in the trunk and parent branches.
4 - growth conditions. soil or fertiliser.
i used a bit of soldering wire trunk to track growth over the season. reasonable results on the M&S plant.