Older specimens commonly 'revert', developing normal adult foliage and starting to grow much faster; this 'reverted' growth must be pruned if the plant is to be kept dwarf.
"Keep you back, dwarf," he warned.
They can go anywhere, do anything, foment wars, keep dwarf fighting elf, elf fighting human... Sartan fighting Patryn.
But it can be kept dwarf with judicious pruning.