Did you quarrel with your beloved and now feel terrible and frustrated? Wanna ask her pardon, but don't know how? So, to my mind the best way is gifting her heaps of flowers in a nice way!
My idea is put the flowers before her window! But needless to say, if you simply lie them, it would be too hackneyed! So, both to surprise her and ask her pardon you may lay out the flowers in a shape of word "sorry". Then send her sms and ask to look through the window! So, the picture she will see is your beautiful flowers and you, standing with, say, balloons and smiling! I think your girlfriend's heart will be softened to the full!!!