In 2008 the first state-level CDU-Green coalition was formed in Hamburg. Drawing on the literature on party goals (vote-, office-, policy, internal cohesion- and democracy-seeking), this article examines the GAL's decisions to join and to end the coalition. It examines the trade-offs between party goals as they evolved in different phases of “schwarz-grün,” with particular reference to the Greens' education reform agenda. While policy- and vote-seeking complemented each other during the election campaign, vote-, office- and party unity-seeking conflicted with each other in the Greens' decision to enter a coalition with the CDU. Later, policy- and democracy-seeking conflicted with each other when a referendum organized by a citizens' initiative defeated the Greens' education reform, a defeat that contributed significantly to the premature end of the CDU-Green coalition. New elections led to defeats for vote-, office-, and policy-seeking when the SPD achieved an absolute majority.