Some of your dutch iris's are about to blooom and some have not produced a flower as yet They have the greenery but no flower forming?

Answer 1

Dutch irises like moist soil. They bloom in the late spring/early summer and, depending on how many plants are in a clump, can bloom for months. If you moved them while or just before they were they were to bloom, you will have to wait until next year because you may have interrupted their sexual cycle. If they are infant plants, they may not bloom after transplant unless they are a mature "mother" plant that has at least one blooming season, and even this is not a guarantee. I have transplanted irises in my yard that have yet to bloom and that was 2 years ago. I was told that if after two seasons of no blooms, you should re-transplant and separate the mothers and the sisters into individual plants and plant them about 6-12 inches apart in every direction. When some plants get too close to each other, as irises do, they will not reproduce at all. This is why if you don't divide your irises every three to four years or so, they will quit blooming.