When we see flowers on a royal hat, those flowers are almost always made of silk. Last fall, British millinery Philip Treacy worked with a group of Dutch Orchid growers and designed a number of hats adorned with real orchids. The results are quite lovely and made what I think would be the ultimate royal spring hat.
Royal Hats
The Bold, Beautiful and Bizarre World of Royal Millinery
Royal Hats 
How does he keep them fresh looking?
It’s gorgeous but I wouldn’t invest in such a hat, as exquisite as it is, if it is to fade in a couple of days or weeks or even months.
It is gorgeous but I think the silk flower ones can be just as nice. You don’t see many orchids on hats and I wish we did!
Thank you for sharing this. He is fabulous! And the orchid hat is exquisite! What a treat it would be to wear one. Pure Magic!