G`day TB
Days cooler than the nights could be the answer ?
https://www.icmag.com/ic/showthread.php?t=295119&page=4
Night vs day temps
http://www.ggspro.com/new/pdfs/upda...retch Through the Morning Temperature Dip.pdf
Thermoperiodic Stem Elongation Involves Transcriptional Regulation of Gibberellin Deactivation in Peahttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC1183420/
Thanks for sharin
EB
About 3-4 years ago I had two clones of Sam's HazeSkunk in flower. One indoors, and one outdoors. The outdoor temps were in low 40's most nights, and that plant took weeks longer to 'finish', but it never did truly finish. The flowering was delayed by the cold temperatures, and she also threw a ton of nanners from the cold. She absolutely hated it, where as the indoor one properly finished weeks earlier with only a few nanners.
If you want your ladies to finish fast, keep it warm night and day, and feed them appropiately. Starving plants in flower has always delayed flowering for me and of course lead to decreased yield. Of course too much nutrients will delay flowering and extend your harvest window. So feed wisely.