Enter freely and of your own will

So anyone else sow seeds and forget you've ever done it? I have some large seedlings germinating in a plant pot next to my front door. I just do not remember sowing any in it, but with my memory being so shot I could 100% have put seeds in and forgot about them. I figure they have to be cultivated seeds because they have that thick fleshy look to them and large seed coats just hanging on their first leaves (I forget the proper name for those thick fleshy leaves) which just do not look like self-sown or wild flowers. I wonder what they will turn out to be?