Impact is created in many different ways in the garden. Sometimes you get impact from a single plant that has an interesting form or stunning color. Other times, you get visual impact from grouping several of the same plants together.  These masses are eye-catching and lend a movement to the landscape that is much needed. Not every plant is cut out for massing, however. It can’t be too big, or too overbearing. And, generally, a good massing plant puts on a show during several seasons: One hit wonders need not apply. Find out some of our favorite plants for grouping in this episode including some bullet-proof perennials and a few dwarf shrubs. In expert testimony, we’ve got a Midwest designer to weigh in with some of his favorite plants for massing—did someone say pollinator magnets? Expert testimony: Austin Eischeid is the owner and principal designer at Austin Eischeid Garden Design based in Chicago, IL.