Bloom times listed below are approximate and depend very much on the weather.
Standard Dwarf Bearded: Early April
Intermediate Bearded, Border Bearded and Miniature Tall Bearded: Late April to early May
Tall Bearded Iris: Late May to early June
TIP: You can sort this list by "Height" to display it in order from the shortest Dwarf Iris to the tallest Tall Bearded Iris.