tulips would work very well a really lovely bright red in a hand tie would look great and tulips used at the reception would bring the spring theme in there too.
or anemone there is a red one called 'marrianne red' used with greenery gives a very natural but a bit different look.
if you prefer to go pink just change the tulips to pink and maybe substitute pink gerbera also you could then use hyacinth to give a beautiful scent.
there is the option of just having white/cream very classic you then have lots of choice tulip,hyacinth,anemone,veronica,narcissus,ranuncula,dill flower maybe even white lilac.
there are some lovely venues in devon and if you decide on march the spring flowers will give a seasonal look and can still give colour as well.
hope this helps.
cassie
cass cook floral design
casscook5bovey@hotmail.com