Allan Carhart said:

What seems out of the ordinary is a pretty lively plant, maybe a weed,
growing from inside the compost. This thing is huge!!
....
If you think you can help me identify it, please check out this URL:
http://www.carhart.com/allan/plant/

Please let me know what you think.

I'd say a potato is most likely.

--
Pat in Plymouth MI

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)