Answer: These shrubs can be cut back very short (6 to 12 inches) in late winter or very early spring. This will encourage the growth of new shoots each year and help control the overall size. However, it will leave ugly stubs until the new growth appears over the spring and summer and the leaves hide them. Alternatively they can be thinned annually by removing a portion, say a quarter, of the branches or stems by cutting them off at the base. Do keep in mind that their normal size is a bit larger than the four foot height you are looking for so it may be difficult to keep them that small over time.
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