Q. I have several well-established autumn-blooming sedums. By the end of the summer, the clumps opened up and collapsed to the ground but kept on blooming. How can I prevent this next year? –E.R.

Dear Jane: I need to know how and when to prune Autumn Joy sedum in the spring. Mine typically get so tall that the stalks fall over onto the lawn. I want to keep them shorter but leave the flowers ...

When new gardeners hear about “pinching” plants, they’re understandably puzzled. Just where do you pinch them? And why? The “where” is the growing tip. You can literally pinch off the tip between your ...