What is the pod on an iris after it blooms?
The bulbs that have formed on the iris flower stalks are seed pods. The pods are often mistaken for new flower buds and are left to grow and develop, which takes extra energy from the plant.
Deadheading, or removing the old flowers, keeps the plants attractive and allows the leaves to collect energy for healthy root formation instead of setting seeds. Some irises may bloom twice a year if you deadhead properly.