Now, how did it get there. I didn't plant sunflowers right next to the porch. After a bit of introspection i do believe I know where the mystery sunflower seed came from. Annika received a single starter pot with a sunflower seed in it. It sat on the rail of the front porch for a few days and then it fell off. She didn't bother to set it back up and tend to it. Well, it had a mind of its own and decided to grow where it fell. I must say, it is the best accidental sunflower I have seen.