In practice this means on-going division and taking "spreaders" (such as bee balm or phlox) out of the neat little beds altogether. It all depends on your tolerance for dividing. Some gardeners can't bear to divide their clumps at all.
Flowers can overwhelm our little gardens, stuff can overwhelm our house, and multi-tasking can overwhelm our lives.
Simplify your garden, your house, and your to-do list. Create some breathing space for your plants and yourself.
What one thing can you let go of today?
Photo from www.landscapinggallery.info