Yes, it can. I had the temps in my closet down between 65-67 at night with my Northern Lights, and they showed some blue in some of the buds. Like haze said, don't let it go too low.
Someone posted an article from high times about purple strains, I think the same things would apply to bb. In the article they say cool night time temps, the right npk ratio, as well as a nice long flush to let the nute levels drop and the natural fall colors will start to show through. My bb started turning blue 2 weeks ago. got about a week left. day 76 since the flip btw.
If you want to see the purple your going to need drop the temps lower then the sixties, you could bring the temps down to the forties and you will be just fine as long as your daytime temps get back into the seventies during the day. I would only do this for the last couple weeks of flowering though, it imitates fall temperatures.
I also have the dp blueberry and i read that they hate cold temps and as far as i could tell it was true.. the winters hear anytime its under 20f outside my room gets to 65-55f in my room and i think if anything they suffer.. im trying purple maxx with my room this time.. only as a foliar so far (im in week 7 of flower) i will also use it at the end in the res in low doeses.. ill post pics when i get a chance..
Alright good deal, thanks surrey. Im gonna do the same and flush for a couple weeks to let the nutes completely drain, and im only gonna let the temps get to around 62-65, iv heard anything less stunts growth. But surrey you should post some pics of your bb, id love to see it
Damn, didnt think that 1st post today went through, and i didnt see the other posts. Well i got about a month before i sog some bb so you guys doin bb so by then i should know what night temp to have em at. feel free to post some pics and any experiements you'v done to bring out that blue
It was the first of 23 to come out fom under the hps it matured really quickly, in only about six and a half weeks. The rest of them need a couple more weeks, I wish I could have gotten some seeds out of it. It would make a great outdoor strain for my summer crop.
Here's a pic of my bb. Not the greatest looking but she's my first grow. I started flush early so that might be helping the color show through more. You can see some red/purple tint showing up on some leaves. The blue doesn't come through as much on camera as it does in person. Looks a little more purpleish. I've heard the blue really starts to come through a couple of weeks into cure.
I thought they'd be almost done by now, day 76 since the start of 12/12. Haven't seen any amber trichs yet and still alot of white pistils.
thats what im trying to do .. someone told me at the very botton.. hit thread or post.. on the right its saying my HTML code is off??? i dont know shit about computers but that could be why i cant.... so bottom tread and a box like this appears i guess then you post