I think you'll know where your husband's heart is with regards to his getting help soon enough. If he wants to leave marijuana behind, he'll need to get on it right away. The window of opportunity is before him what with having just spent some time in jail. If too much time passes, the window will close and he'll forget how he hated that experience and he'll be back to where he was before he went to jail and want to smoke his weed again. You can't make him get help. He'll either want to do it or he wont and if he doesn't then you know where you stand--right back where you were before he went to jail. Be prepared to make stick your resolve to follow through with what you've decided to do should he decide he doesn't want to get help.