Growing Bulbs in Stones for Wedding
by Kelley
(Ontario, Canada)
Doug says don't do it. You won't get reliable bloom on the home scale (tough enough on the pro level) - see the articles all over the answer pages on this site about trying to grow flowers for weddings.
So - no bulb or flower I know of is going to bloom on time/schedule for any date unless you have a full control of temperature and sunlight.
You might get lucky and then again- the odds are you're going to be very, very disappointed.