#1

Nov 1st, 1972

1st Appearance of Alec Holland Swamp Thing, Swamp Thing Origin

#1B

Oct 1st, 2019

Dollar Comic Edition

#2

Jan 1st, 1973

Cameo Appearance of the Patchwork Man - 1st Appearance of Anton Arcane

#3

Mar 1st, 1973

1st Appearance of Abigail Arcane - 1st Full Appearance of the Patchwork Man

#4

May 1st, 1973

#5

Aug 1st, 1973

Brother Power appears

#6

Oct 1st, 1973

#7

Dec 1st, 1973

1st Meeting of Batman and Swamp Thing

#8

Feb 1st, 1974

#9

Apr 1st, 1974

Classic Swamp Thing Cover

#10

Jun 1st, 1974

#11

Aug 1st, 1974

#12

Oct 1st, 1974

#13

Nov 1st, 1974

#14

Jan 1st, 1975

#15

Apr 1st, 1975

#16

May 1st, 1975

#17

Jul 1st, 1975

#18

Sep 1st, 1975

#19

Oct 1st, 1975

#19-MJ

Oct 1st, 1975

Mark Jewelers Insert Edition

#20

Jan 1st, 1976

#21

Feb 1st, 1976

#22

May 1st, 1976

#23

Jun 1st, 1976

#24

Aug 1st, 1976