Who planted spiderwort under my deck?

Trimming around the deck today, I found all kinds of strange stuff growing out from under it, including this spiderwort.

[katy]

It looks so pretty coming up through the cracks. Nice light.

[Kathy]

It's a shame it's so invasive because this is a lovely sight.

[Lisa Poland]

@grammyn @randystreat Yes, I didn't even realize it was there at first. The flowers were quite small and mixed in with another weed.