I'm getting married in September and we have guests coming from all over the continental U.S., Hawaii, and the UK.
Most of our guests will be from the East coast, but a few will be from California, Hawaii, and the UK.
Katie, what a great wedding favor...seeds. But beware in Hawaii and elsewhere many plants aren't permitted. But a good selection might be different types of tomato seeds. Tomatoes were called "love apples" by the French.
You would need to check with the different country agriculture departments, but with perennials you get involved with temperature zones, climate, etc. also. Have a lovely wedding day. Thanks for contacting PHS. ep