This one recently appeared in a pot on my deck. It looks a lot like moringa, and I do have some moringa seed, but I don't think I stuck one into this pot.
Thanks in advance,
Yep, looks like Moringa to me too. The only flowering plant I know of which has tripinnate leaves (which you can see in the first photo).
Mr. Darwiniensis is right.It is Moringa oleifera. Horse raddish tree or drumstick tree