I've had the best luck with planting them in the ground on the east side of the garden where they get Morning Sun.

Mine grow anywhere in the ground but seem lankier when there’s more shade. If the bulbs are mature, it is possible that transplanting now might cause them to skip this year’s blooming. you can wait for blooms this year and transplant in September. Then again, if bulbs are immature, they weren’t going to bloom anyway, so might as well transplant now.

how do you know if mature or not? Well, you kinda need a crystal ball. I have said this many times already; I transplant when convenient for me and don’t care if I miss blooms. There’s always next year.

i have concluded that planting bulbs together helps glads support themselves, whereas if you plant each bulb 6” apart, there’s more opportunity for flopping. I hate floppy plants. So, I plant close together, contrary to common wisdom.