fecund

fecund \FEE-kuhnd; FEK-uhnd\, adjective:

1. Capable of producing offspring or vegetation; fruitful; prolific.
2. Intellectually productive or inventive.

Wainscott's book is . . . focused squarely and surely on probably the most astonishingly fecund period in American theater history, 1914-1929.
-- James Coakley, Comparative Drama

In her first novel she portrays a lush, fecund landscape palpable in its sultriness and excess.
-- Barbara Crossette, "Seeking Nirvana", New York Times, April 29, 2001

Miss Ozick can convert any skeptic to the cult of her shrewd and fecund imagination.
-- Edmund White, "Images of a Mind Thinking", New York Times, September 11, 1983

Fecund comes from Latin fecundus, "fruitful, prolific." The noun form is fecundity.