Engeland, rond de eeuwwisseling, in een mijnwerkersstadje in Wales. De familie Morgan waarvan de vader hard en streng is en de vrouw, lief en een zacht karakter, voeden hun mijnwerkers zonen op, maar hopen op een beter leven voor hen.
Nee, helaas is Hoe groen was mijn dal nog niet beschikbaar op Netflix in Nederland.
| Directing | John Ford | Director |
| Writing | Philip Dunne | Screenplay |
| Sound | Alfred Newman | Original Music Composer |
| Editing | James B. Clark | Editor |
| Camera | Arthur C. Miller | Director of Photography |
| Production | Darryl F. Zanuck | Producer |
| Art | Richard Day | Art Direction |
| Art | Nathan Juran | Art Direction |
| Writing | Richard Llewellyn | Novel |
| Art | Thomas Little | Set Decoration |
| Costume & Make-Up | Gwen Wakeling | Costume Design |
| Sound | Eugene Grossman | Sound |
| Costume & Make-Up | Guy Pearce | Makeup Artist |
| Sound | Roger Heman Sr. | Sound |
| Camera | Paul Lockwood | Assistant Camera |
| Directing | Gene Bryant | Assistant Director |
| Sound | Hugo Friedhofer | Orchestrator |
| Visual Effects | Chesley Bonestell | Matte Painter |
| Sound | Edward B. Powell | Orchestrator |
| Crew | Cliff Lyons | Stunts |
| Visual Effects | Fred Sersen | Visual Effects |
| Production | Ray C. Moore | Location Manager |
| Directing | Edward O'Fearna | Assistant Director |
| Directing | Wingate Smith | Second Assistant Director |
| Sound | Tudor Williams | Music Arranger |
| Camera | Joseph LaShelle | Camera Operator |
| Visual Effects | W. Percy Day | Matte Painter |
| Production | William Koenig | Production Manager |
| Production | Gene Bryant | Unit Production Manager |
| Sound | Edmund H. Hansen | Sound Engineer |
