purple leafs?

hello i dont have much time to do any reading so i figured i would post my question and see itwof i could get some quick answers.
250watt led panel with two 40watt cfl bulbs and two 26watt cfls, all cfls are 2700k
now im a bit confused as to why my leafs are purple like this..
my temps are 20-28 w/ lights on and im not sure with lights off..
i sleep in the same room so its not freezing and i have another plant right by my window that would be colder all the time with no purple.
it doesnt look like temps either.. looks more like the light is doing it.
here are some pics.
she had 2 months and a bit to veg and i flipped her to 12/12 on nov 9th i believe, its written down somewhere.
i dont know her genetics, she came from a batch of "indoor seeds" from vancouver seed bank.
she is a clone of her mom and when i harvested her mother she had a lot of purple but not on the big fan leafs like this.
i give her calmag, 20-20-20 food and i have liquid kool bloom at 0-10-10 that i give her sometimes.
i also give the thrive alive b1 and some seaweed extract. i also top dressed with worm castings when i flipped her.
any insight or pointers on anything are welcomed and appreciated!!
oh and she has an intake and outtake fan in her box and a ten inch and 8 inch fan inside moving the air around for her.
when i get home tonight ill upload more pics of her but heres what im concerned about right now.
thanks fellas and chiques!!

Plants just turn purple sometimes nearing the end of flower. Your night temps may also be a factor. Should be beautiful when its flush time.

Count yourself lucky! I'm yet to grow anything that has purpled, and they do look rather stunning

The purple can also be a sign of nute lock out or nitrogen deficiency if it's the stems and leaves. Since you have been feeding a high N fert, it may be locked out. Or like dude said, it could just be how she's made.

IMO- You have a Phosphorus Deficiency going on.
IMO- if it's like 2 weeks from harvest, I wouldn't mess with it. It's not worth it that late in flower. Chalk it up as growing experience.

Good Luck on Your grow.

Ibex said:

Plants just turn purple sometimes nearing the end of flower. Your night temps may also be a factor. Should be beautiful when its flush time.

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your plant is beautiful!! i think theres 20 days or so left, i will be looking at trics in a week or two.
i have done some extensive reading by a few mods on here and some other "well knowns"
and i have read extensively not to flush or stop nutes in the end, calyx doesnt store nutes so im not flushing.

Bubbagineer said:

The purple can also be a sign of nute lock out or nitrogen deficiency if it's the stems and leaves. Since you have been feeding a high N fert, it may be locked out. Or like dude said, it could just be how she's made.

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i think i have only fed her a total of 6-7 times through out her whole life, could that still cause lock out?
it is purple in the stems and viens

topfuel29 said:

IMO- You have a Phosphorus Deficiency going on.
IMO- if it's like 2 weeks from harvest, I wouldn't mess with it. It's not worth it that late in flower. Chalk it up as growing experience.

Good Luck on Your grow.

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what makes you think its phosphorous?

thanks for the good luck

and thanks ya'll for the help!

low soil temps slow P uptake. here's a study you should read...don't add P. purple is highly prized in weed.
http://www.ipni.net/publication/bettercrops.nsf/0/2E6E4914B9C3D79E8525798000820186/$FILE/Better Crops 1999-1 p16.pdf

dannyboy602 said:

low soil temps slow P uptake. here's a study you should read...don't add P. purple is highly prized in weed.
http://www.ipni.net/publication/bettercrops.nsf/0/2E6E4914B9C3D79E8525798000820186/$FILE/Better Crops 1999-1 p16.pdf

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reading!!!
will get back to you with my questions

nova1992 said:

I have read extensively not to flush or stop nutes in the end, calyx doesnt store nutes so im not flushing.

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Everyone has this debate, I grow full synthetic nutes and will continue to flush. To each their own.

I read earlier today that someone only cures their bud for about 48hrs before its sold, everyones got an opinion on the internet

dannyboy602 said:

low soil temps slow P uptake. here's a study you should read...don't add P. purple is highly prized in weed.
http://www.ipni.net/publication/bettercrops.nsf/0/2E6E4914B9C3D79E8525798000820186/$FILE/Better Crops 1999-1 p16.pdf

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okay so if the uptake of P is "slowed" does that mean everything will slow down?
my plant looks/acts very healthy, theres no clawing, the stems and leafs are purple on like 1/3rd of the plant.
i only feed when i think she needs food, lighter leaf colour, slower growth etc.
should i get a 10/30/20 food or a 1/3/2?
im still trying to work my foods out, im going to the store soon to see if i can find something better.
id get peters but they dont sell in canada
if my soil is too cold then should i put a heat mat under my plant?
thanks for your input!!

Ibex said:

Everyone has this debate, I grow full synthetic nutes and will continue to flush. To each their own.

I read earlier today that someone only cures their bud for about 48hrs before its sold, everyones got an opinion on the internet

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true true
ya most people out here dont cure at all.. i didnt even know it could be curred till i came to this site haha
my last landlord had 150 plants in a SOG and sold it right after drying it.. with a heater, now i look back on that and shake my head lol
not proper at all lol

nova1992 said:

true true
ya most people out here dont cure at all.. i didnt even know it could be curred till i came to this site haha
my last landlord had 150 plants in a SOG and sold it right after drying it.. with a heater, now i look back on that and shake my head lol
not proper at all lol

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Astonishing (not you of course)...

Mine usually hits about 3 weeks of cure before it leaves and is distributed. Then again, the cost of cannabis isnt cheap so I like to atleast make the value worth it compared to the uhhum "dank" that is around my clientele.

I would cut way back on nutes esp since your almost done. Mostly on nitrogen you dont need all that in flower they look beautiful I would slowly cut back on nutes and let them go thats my 2 cents

nova1992 said:

i think i have only fed her a total of 6-7 times through out her whole life, could that still cause lock out?
it is purple in the stems and viens

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On 2nd thought, if it were N def, the rest of the leaf would be more yellow whereas yours are dark green. Also, if you were actually locked out as opposed to just underfed, then the leaf tips would curl down.... not claw down as in what happens from too much N, just the tip will curl down. If you have this along with the purple, then I would flush with 3x the amount of water as the amount of soil in the pot. otherwise, I would just let em finish, they will be good smoke from the looks of things.

nova1992 said:

okay so if the uptake of P is "slowed" does that mean everything will slow down?
my plant looks/acts very healthy, theres no clawing, the stems and leafs are purple on like 1/3rd of the plant.
i only feed when i think she needs food, lighter leaf colour, slower growth etc.
should i get a 10/30/20 food or a 1/3/2?
im still trying to work my foods out, im going to the store soon to see if i can find something better.
id get peters but they dont sell in canada
if my soil is too cold then should i put a heat mat under my plant?
thanks for your input!!

Click to expand...

no, other elements are good. only P. get the 1-3-2 and finish off your grow with that. fertilize before you see signs of lighter leaf color. the idea is to avoid defs.

nova1992 said:

what makes you think its phosphorous?

thanks for the good luck

and thanks ya'll for the help!

Click to expand...

Purple patches on the leaf in this picture. Makes me think it's a (P) issue. The purple is not on the tips, and not on the leaf margin. Purple patches are close to the mid rib of the leaf.
Your other 2 pictures look like the purple is from the cold. Leaf tips, and leaf margins turning purple. Your leaf tips, and edges will turn purple first when it's cold.

i will follow your guyses pointers and im definitely going to read more about the different elements the plants need and how they interact and how they work etc.
its awesome to have such helpful people a click away
off to the store today!!
thank you so much all of you!

lol 3 cats in this thread