Someone left flowers on my porch, now what do I do?

On my way to my car today I noticed a small potted flower on the side of the porch near the steps that go down to the driveway where I park my car. On the little paper around the pot someone had written my name on the flap in ink pin but didn't leave a note or anything. I really want to know who it's from. I thought about posting something on my Facebook about it, in the hopes that the person that left the flower would see it. However, I didn't want to upset the guy I'm kind of talking to if he wasn't the one that left it (and I don't think he was.) What should I do?
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The insert for the flower said it was from Harris Teeter. The person is obviously someone who knows where I live, but like I said I'd be really shocked if the guy I'm talking to is the one responsible. I don't know who else it would be though. I almost posted a photo of the flower asking where it came from but like I said I didn't want to potentially offend someone. Do you think the person that left the flower will contact me (text/phone-call/Facebook) or say something to me?
Someone left flowers on my porch, now what do I do?
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