Answer: Tamarix ramosisima is a rapidly growing shrub or small tree and can be pruned in late winter or early spring to control size or appearance. It blooms on new wood and can be pruned back hard, including to within several inches of the ground, in late winter each year (as with Buddleja) in order to keep plant compact and to promote better form and growth. If it's a tree-shape you're after, remove the lower branches (expect to see new sprouts along the trunk in the spring) and then shorten the length of the branches on the side it leans to. When new sprouts develop along the trunk or branches in places you don't want new branches, simply rub them off. They will eventually stop emerging from these areas and will instead emerge from the tips of the remaining branches.
Best wishes with your Tamarix!
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