Question: How do I know when it’s time to divide my old plantings of perennials?

Answer: There is no one rule of thumb, but if they fail to bloom properly, that’s usually a good indicator. If the crowns have multiplied and the plants are tightly congested, you probably need to divide them. If shade trees have grown larger and now cast excessive shade, it’s time to move the perennials to a brighter site.

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