It is a haiku:
Eyes fed with grim rot
O fertile rhyzome say yes
to ongoing life
or something like that. He has added the positive note: "to ongoing life" as opposed to, say, "decay and death." What can he say. He is a cock-eyed optimist.
But, back to the potato. What, probably, did he do with the it? Certainly, he didn't plant it. But he could have. And, actually, he still can. Carry it out.