I don't see anything intrinsically wrong with laying flowers before Mary after Communion at a wedding, but I have some vague recollection of recently reading somewhere why we're not supposed to. Any ideas? The only one I can think of is the whole "we don't add things that aren't in the rubrics" reason.
(which, as weddings tend to go, would be the LEAST of liturgical abuses...)
and speaking of which, if I ever get married, I will have an interesting wedding. The priest will definitely walk down the aisle. Myself and my bridesmaids (if I decide to have them-after being in several weddings, they seem so...superfluous!) will walk down to the Gregorian chant proper antiphon introit thingy, sung by a schola of men. The same for Offertory and Communion. ha. and that's just for starters...
(someone asked, "Mara, don't you realize that there will be someone else involved in the planning of this wedding?" my reply? "um, well, if he's marrying me, he's going to know my opinion stands in all things musical, unless he has similar [or better] tastes in music and beliefs about liturgy. [that'd be nice, but unlikely...] I mean, gosh, he can pick the dresses, the flowers, whatever, I don't care!")