Help me with Rose Cones

Hey Ladies,

I ordered rose cones online, but they are just squares that I have to roll into a cone and glue them together myself...thought it was a good idea at the time! They are plantable, so they are thick (the same thickness as card stock) and I'm not sure what I should use to make them stick. Crazy glue? Double-sided tape? OR is there something else that anyone could recommend???? I'd hate to make a 100 only to have them fall apart! Thanks Ladies!