This year, I've decided to cut back all of my perennials in the fall (but, of course, not my Japanese Maple tree) just to see if I end up with a different result when next season comes around. I had no choice but to cut back my Lespedeza because this is the year I am forced to divide it which I expect will not be an easy task given how long it's been in the same pot.
I've included pictures of one of my butterfly bushes. In the first picture, you can barely make out the blade of my pruners cutting one of the stems. The second picture shows what the plant looked like after I finished the job. It just so happens I did more research on cutting back butterfly bushes (after I had already cut mine, naturally) and I think I may have been a bit too aggressive. I guess I'll find out.
I'm going to be away for a little while. At the end of this month, I will be posting more information about planting bulbs because that's when I'll be ready to plant mine. You can still find a nice selection in the nurseries and online at sites such as www.whiteflowerfarm.com but they're going fast!
Bookshelf: Container Gardening Books