so two summers ago a friend of mine let me dig up all the gorgeous irises in her backyard (she didn't want them). light purple with yellow centers. i planted them, and last spring/summer they came up as expected. only thing was about 1/2 or more of them didn't send up blooms. last summer i got more irises from the same friend - lovely burgundy ones. i planted these as i did the previous bunch and got the same result. came up all leaves, but this batch has yet to show a bud or a bud stem. is this a normal thing? do they need a while to establish themselves? or is there something i can do to "push" my irises to bloom? i'd really like to enjoy more than just their leaves. thanks!