I love the Gladiolas. I did have a similar idea. I bought the smaller version, the short Glamini Glads and planted them around the garden. I bought 200 and they come in 25 to a bag. So I spaced out the planting and kept planting a bag or two every week or two. That staggered the blooms. Of course next year they will all come up at pretty much the same time in the spring. But they are just so pretty with all their colors and color combos. I did put some in my square iris bed between the irises as well as lots of other places in my garden.