No. 2 -- Iris (Flags)

Every garden needs a spiky plant to add interest. With only a few plants fitting the bill, Iris quickly become a first, easy choice. Iris pumilus with heights of about eight inches to well over four feet for the wonderful sibirica varieties, and in all the colors of the rainbow, surely there's a spot in your gardens for a few iris. Pictured is Iris pumilus 'Betsy Boo' and Saxafraga arendsii 'Peter.'