Floral glue is available in both a tube and large liquid can. One tube can do several corsages or bouquet holders. If you have a lot of attendents, or plan on doing a lot of corsage work, I suggest you invest in two tubes.
Floral adhesive needs a short amount of time to set up. You can glue each leaf individually, or spread the glue over the entire back of the bouquet holder if you can work quickly before it dries.
Place the leaf against the bottom of the holder and press and hold a few seconds. This glue does not work instantly like hot or cool melt glue - it needs time to adhere properly.
Add more glue if needed before applying more leaves.