When do gladiolus bloom?

Cut them when one or two buds are open or when all buds are open. Do this --> cut them longer than you want them to be. Like if you have an eight inch vase, cut them about ten inches long. Take them into the house. Put water in the vase and then re-cut them. Put the flowers into the vase very fast. That's because when you cut them, the stem starts sealing itself and they can't drink any water. So you always cut them twice, once when you pick them and again before putting into a vase.