If you have grown glads in the past you've probably noticed that they all bloom about the same time, last for a week or so and that's it. If you'd like to have glads blooming most of the summer, the trick is to plant them over the course of a month or so. With successive plantings, you would plant 8-12 bulbs one week, then another group a week later and another group a week or so after that.
Plant the bulbs (or more correctly the corms) in full sun in well drained soil. If you plant early in the season they will take 8-10 weeks to flower, but if you plant in warmer weather (June), glads will bloom in 6-8 weeks. They come in so many beautiful colors, I hope everyone will give them a try this year.
-MJ