( ( ( ( ( Seeds ( germinated well ) ) , ) and ) ( seedlings ( ( grew ( under ( ( ( quarantine conditions ) and ) then ) ) ) ( in ( the nursery ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Seeds)) (VP (VBD germinated) (ADVP (RB well)))) (, ,) (CC and) (S (NP (NNS seedlings)) (VP (VBD grew) (PP (IN under) (NP (NP (JJ quarantine) (NNS conditions)) (CC and) (NP (RB then)))) (PP (IN in) (NP (DT the) (NN nursery))))) (. .)))
Seeds germinated well, and seedlings grew under quarantine conditions and then in the nursery.
(ROOT (S (NP (NN Seed)) (ADVP (RB dormancy)) (VP (VBZ ensures) (SBAR (IN that) (S (NP (NNS seeds)) (VP (VBP germinate) (ADVP (RB only)) (SBAR (WHADVP (WRB when)) (S (NP (NP (NNS conditions)) (PP (IN for) (NP (JJ seedling) (NN survival)))) (VP (VBP are) (ADJP (JJ optimal))))))))) (. .)))