Like I said previously, sending flowers to her school really is full of all sorts of pitfalls. You need to check for quite a number of things, and if you get maybe one of these wrong, the whole plan can end up kaput.
Do you have the complete address of the school? This one’s pretty easy to work out, so there’s really no excuse for not having this information. Trickier… will they let the flower delivery person bring the flowers in? Some schools, well actually, most schools had pretty heavy security so that delivery people could only get as far as the guard house at the school entrance, and no further. So there the flowers would wait. Pretty much completely useless.
And even if the delivery person were allowed inside, you still have to find out her schedule. Her list of classes. The classrooms in which those classes are held (since they might change rooms). And that’s just the beginning. It’s quite a mess.