Swamp Thing, Vol. 2 #116 (1991)

The Growing Season
A boy named Casey Quigley finds a still living tuber within one of Swamp Thing's discarded bodies. He plants it. He and his mother Lena live a hard life of poverty with her husband and Casey's father, Dan, the principal source of misery. Lena would like to take Casey and live in Missouri, free of Dan, but keeps putting this off. The tuber begins to grow into a large tree. Dan returns home one day, saved and now a fundamentalist. Except for the secret sins, like drinking. When Casey tries to check on his tree, Dan insists he go to church, asserting that the swamp is one of the Devil's places. One day, when Lena has thrown away Dan's stash of wine, he becomes enraged and prepares to beat her; Casey talks back to him and runs away with Dan hot on his heels! Casey reaches the monstrous tree and climbs its passages, past faux organs. Dan follows, growing angrier by the minute. Casey reaches a pool of acid - the stomach analogue. Dan slips and falls into that pool! Neighbors do not know what became of the Quigleys until he receives a letter from Casey, post marked Missouri, telling him to pick all the tomatoes he wants from the Quigley trailer garden. Waiting for new folks to move into that trailer, he muses that nothing's ever quite the same after the growing season...
Release Date: 1991