speed up flowering

I have 3 "80 day" auto flowers going, it's day 85 and 2 are done, but 1 looks like it is lagging by 2 or so weeks. The problem is I am going out of town in 3 weeks and need time to trim/dry/put into jars before I leave so it's easy for a friend just to burp the jars. Do you guys know of any...