It is a rule of the Rose Parade that all surfaces of the float framework must be covered in natural materials (such as flowers, plants, seaweeds, seeds, bark, vegetables, or nuts, for example); furthermore, no artificial flowers or plant material are allowed, nor can the materials be artificially colored.

These floats are amazing! Magnificent colors.
Thanks Donna. Yes, there are.
Love all the colors on this dragon.
Pat, they are amazing
Such vivid colours. Beautiful. 🙂
Thanks so much!
These floats are incredible – I can’t believe there is so much natural product to cover them all! 🙂
Joanne, it is indeed a requirement to use natural items to decorate the floats.
WOW – truly amazing!!!
Thanks Joanne