Hi there,
I had hoped to do the seed thing too, but ran out of time for it and many other things! Anyway, I was going to get Forget Me Not seeds. Very traditional 'English country garden' style flower and I think the name's very appropriate for a wedding - it's supposed to signify true, unforgettable love. Just in case that idea appeals, there
are various sources in the States for customised packets of seed to use as favours - I Googled today and found some sites offering different seeds and style of packaging, and the prices and minimum order requirements varied widely.... You could do worse than to check out
This Favour Supplier called 'Forever&Always'. I haven't used them, but I really like their stuff. If Forget Me Nots don't appeal they also do other seeds too. They customise the packets, the price isn't too bad and I notice they can do rush orders as well ... If only I'd found them last year ...
Looking at all this sort of stuff kind of makes me wish I could get married again - to the same guy, of course!!

Hmm, repeating vows annually, perhaps!??!
All the best,
Sheila