Whichever way you decide to go with your flowers, a lovely idea is to try and tie your whole theme together so if you're going for roses, then have a rose design featured somewhere within your headdress. Look out for a company who can work with you and your designs and most importantly your budget to create that one_off, bespoke creation just for you.
My parents house was a traditional home that had the typical Japanese garden in the back with various different trees, plants and many seasonal flowers. I grew up playing around our Japanese black pine, Japanese plum, loquat (Eriobotrya japonica) and pomegranate trees, all the while enjoying the azaleas, camellias and many other flowers that my father nurtured with so much love and dedication. I also remember that we had flowers that were originally introduced in Japan from foreign countries, such as Amaryllis (Belladonna Lily), roses, daisies, and dahlias. So while our garden was very Japanese in style, I can now see how it was more like a display of universal nature.