When to lower temps for purple strains

How many weeks before harvest should I lower temps at night for purple strains?? Ive kept the temps around 74 throughout the veg and flower so how many degrees should I drop it?? Should I drop temps during the day a little too?? How long should I keep dropping temps before harvest??

In my experience with purples the bulk of color change happens in the last 1/4 or so of the flower cycle.Lowering temp has biggest affect during this time not as much before.Plant maturity is tied to color also.I try to keep my room at 60 or below if possible.Keep the temp as low as possible 24 hrs a day.

ouizer said:

.Keep the temp as low as possible 24 hrs a day.

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thats not good advice, he was right in saying that they get the last bit of color near the last few weeks of flowering though...(usually in the last 2-3weeks of flower)

If you would like a purple color its best so start with a strain that turns a purple color. If you would then like it to be more colored by temp changes (which do really nothing for the bud but make it grow worse because of low temp conditions)

The best way to do that is to lower the daytime temps in the room to around 60F. Then @ night you want it to drop 10 to 15 degrees lower than the daytime temp to a temp of 45F-50F

I would actually suggest finding better genetics though for the best purple colors without having to screw around with temp changes. Having a cold or hot room lowers yields terribly and is actually the most common factor for low yields.
Im growing this strain out in my room now, it got this purple in a room that was 78 degrees Fahrenheit. Pm me if you want more info on this general subject or the strain Im growing

my experience is lower it 10 degrees during the final few weeks of flowering (lower it during the light off period). i have a grand daddy purple urkel hybrid that is very nice purple color. i will post pics of them when i can...

mountianstar said:

thats not good advice, he was right in saying that they get the last bit of color near the last few weeks of flowering though...(usually in the last 2-3weeks of flower)

If you would like a purple color its best so start with a strain that turns a purple color. If you would then like it to be more colored by temp changes (which do really nothing for the bud but make it grow worse because of low temp conditions)

The best way to do that is to lower the daytime temps in the room to around 60F. Then @ night you want it to drop 10 to 15 degrees lower than the daytime temp to a temp of 45F-50F

I would actually suggest finding better genetics though for the best purple colors without having to screw around with temp changes. Having a cold or hot room lowers yields terribly and is actually the most common factor for low yields.
Im growing this strain out in my room now, it got this purple in a room that was 78 degrees Fahrenheit. Pm me if you want more info on this general subject or the strain Im growing

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and if you like hermie plants.... alter temps.

if the purple your talking about is granddaddypurple it will flower on its own at the end without ac.Good luck

headbandrocker said:

if the purple your talking about is granddaddypurple it will flower on its own at the end without ac.Good luck

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ive had GDP not turn purple in the summer so sometimes that is not always the case.

stucklikechuck said:

my experience is lower it 10 degrees during the final few weeks of flowering (lower it during the light off period). i have a grand daddy purple urkel hybrid that is very nice purple color. i will post pics of them when i can...

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headbandrocker said:

if the purple your talking about is granddaddypurple it will flower on its own at the end without ac.Good luck

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did you two not see this picture? The plant was in a room of 75 dgree temps its WHOLE life.

bleezyg420 said:

and if you like hermie plants.... alter temps.

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you are exactly right. If you want a purple strain get some purple genes and they will do it all on their own.

Its so true. temps have little effect on color. Nor does age. So lowering the temps for the last 2wks is just a bad idea. It wont do a thing good for your color. Its all in the plant

doctorD said:

Its so true. temps have little effect on color. Nor does age. So lowering the temps for the last 2wks is just a bad idea. It wont do a thing good for your color. Its all in the plant

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+rep for someone else that knows what they are talking about

purple weed strains turn purple on there own. Even if ya lower the temp on a non purple strain just the leaves will purple not the bud

Thanks go out to everyone for the great info.

mucho welco

Been growing purple urkle since it was created and grand dad not too long after, I have sold thousands of clones of the same and gotten many reports back.Don't know about other purp strains but neither one is guaranteed to turn purple.I live in an area where the temps are frequently in the range I quoted at harvest time and the plants do great.I imagine weed wouldn't grow in the high mountains if temps were so detrimental. But then I am talking about outside at the moment.I do know though that the ppl who have gotten urple from me and growing it indoors that have trouble getting good color are always more successful when they get thier temps lower, and when I am on my indoor cycle I find the same.I don't find any diference in yield or quality and regularly get well over .5 grams per watt.

ouizer said:

Been growing purple urkle since it was created and grand dad not too long after, I have sold thousands of clones of the same and gotten many reports back.Don't know about other purp strains but neither one is guaranteed to turn purple.I live in an area where the temps are frequently in the range I quoted at harvest time and the plants do great.I imagine weed wouldn't grow in the high mountains if temps were so detrimental. But then I am talking about outside at the moment.I do know though that the ppl who have gotten urple from me and growing it indoors that have trouble getting good color are always more successful when they get thier temps lower, and when I am on my indoor cycle I find the same.I don't find any diference in yield or quality and regularly get well over .5 grams per watt.

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If you are lowering your temps below 70oF then you ARE hurting what you could be yielding. The reason that the bud turns purple when you lower temps is because that strain also has the bud change color when you fuck with temps. Just like some strains leaves change when you lower temps.
TONS of people can get close to .5 grams a watt, thats only HALF of what you should be aiming for, so your yields are jeopardized whether you believe it or not.
.5 grams for every watt of a 1000 watt light is only 500grams....I know people that pull a gram per watt flowering straight away as soon as clones root....(and their weed is purple because they are growing good genetics

Thats also affected by how long you veg though so the yield quote is really info that shouldent be brought into this discussion.

My point is that if your growing and you want a definite purple color you need to go with a strain that will deliver that. If you lower temps your fucking with the plant natural life cycle and stress the plant. Lowering temperature affects food production in the leaves as well as transpiration processes. If you want I can bring a bunch of experienced people in here to tell you that you are indeed misinformed. Ive been doing this for long enough that I know EXACTLLY what Im talking about...

doctorD said:

Its so true. temps have little effect on color. Nor does age. So lowering the temps for the last 2wks is just a bad idea. It wont do a thing good for your color. Its all in the plant

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what are you talking about? lots of strains go purple when you lower the temps. Its not unsafe at all. and maturity has lots to do with it SMH at you saying that

Its true temp can have some effect but its small at best. I have found its mor a ph thing. A plant has to have the tendancy to go purp or it wont matter it just wont go from green to purp. Its not just marijuana that reacts like this. Look at azalias (not close on spelling) the color on them is directly related to ph. So I have been doing some testing. If you lower the ph a bit it will get a deeper purp color.

ok my plant seems to grow faster when i stash it in the bathroom with just 2 cfl bulbs going??? it is greener and developed 3 more leaves over night i counted 13 this morning ....any explanations for this? the temp stays around 72 f. i am puzzled over this but i have read about growing outside with only natual light and fluctuating temps. i have no idea what strain this is.

mountianstar said:

If you lower temps your fucking with the plant natural life cycle and stress the plant.

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what??? it gets cold outside in the fall at night. that sounds pretty damn natural to me. damn you mother nature for being unnatural!

ok i wanted to put this with my last post but my cam was acting up. 2 different strains here but you can see how purple the one is. I have had other cuttings even a much darker richer color all from just a bit lower ph. not one difference in temps so its the plant not the temp.