I guess nobody here grows these things, either because they're too tall or glads aren't popular anymore.

I grew a few Glamini 'Charlotte' in 2012 for the first time. They were reasonably short if I remember correctly, but they were floppy and leaned badly, worse than some of my taller ones. Possibly I planted them a bit too shallowly. I never stake glads for lack of time and materials.

I have been starting glads early, get them to about 8" high and then transplant them deep so that only about an inch of green sticks up out of the soil. That keeps them upright quite nicely. . Alternatively plant them in a deep trench and fill it in as the glads grow.

Sorry, I have not grown the Glamini although I almost ordered them one year - I thought if they were smaller, I would be able to include them in a bouquet. Guess that wouldn't have worked after all.

Hey NAF, I grew them for one year, but gave up because I wanted all the space for perennials. I just don't feel like planting and digging up bulbs every spring and fall! Maybe at some point I can have a cutting garden, but I won't have time to dig a bed for that any time soon so...

From what I had read back when I was growing them, Pudge got it right for how to keep them from flopping - trench them, and fill in the trench as they grow.