I am making Buttercream tiers with Fondant Drapes and Fresh Flowers. How would I attach the Fresh Flowers?

Thanks.

Not sure if this is what your idea is but what came to mind is the wilton fresh flower holders. These come in a variety of sizes and shapes from spikes to cups. You can even put water in the spikes and insert the flowers, then you simply place them in your cake. Hope this helps

I do have those (...somewhere) but I wasn't sure how "necessary" they were. Not sure if the flowers could survive a couple hours on their own, and if so, how would I secure them to the tops of the fondant drapes?