Synonyms for Full-blown:

adj.

all (adjective)
matured.
all-out (adjective)
adult, ripe, mature, developed.

n.

fresh, flowery, big, adult, nosegay, centerpiece, developed, buttonhole, of age, grown, bouquet, bunch, youth, bloom, ripe, full-fledged, full-grown, boutonniere, grown up. full-blown (noun)
complete, mature, matured.

Other synonyms:

full-fledged, fully grown, boutonniere, nosegay, fully fledged. ripe, buttonhole. bloom. big. bunch. growth, fresh.