Just a quick word about bearded irises. . . while it is true that they are tough, it is worth it to try and move them at the right time of year, when they're dormant. July/August is the ideal time, though warmer climates can get away with replanting in late September/early October. A general rule of thumb is, the colder the climate, the earlier one should replant bearded irises. Also, it isn't a great idea to plant them using compost unless it's very well decompose because this can cause the rhizome to rot.