I've done a fair amount of testing with cold temps in my grows.
The outcome of these tests always result in increased potency.

I've used tanks of co2 before, I have two of them.

The basis for my testing was to place a 50lb block of dryice next to my plants, the dryice comes enclosed in a cardboard box, I rip one side, halfway down the side, and place a computer fan on the box, blowing the cold co2 encased cold air over my ladies.

Now to prove or disprove my theory, I've done the same strain, using my tanks of co2, and I could not reproduce the same results using a tank. Why is this relevant? Becasue dryice, is pure co2. However it is negative 80 degrees.
Not even close.

What did I experience form using the dryice? The dryice, aside from cooling my growroom, would blow over the top of my plants, and fall onto them. The flowers and the leaves would heavily frost up with trichomes, that were easily visible to the human eye. The smoke was also, much more potent.

I remember reading about cold temps and increased thc production, but I can not find the article. No matter.

When using the dryice, each day showed dramatic differences in the plant, it was very exciting to check on them.

Now, if you want to reproduce this experiment, I'll give you some tips:

Dryice is easy to find, but difficult to find at a "fair" price.
Of course, it is easier in the bigger cities. Start your search here, http://www.dryicedirectory.com/
Some places want to charge as much as $1.50 per pound, this is very expensive at this price.

A fair price is anywhere between $14.00 & $21.00 for a 50 lb block.
When a merchant quotes you a higher price, tell them you buy it regularly, and are use to paying about $15.00 a block, your just new to the area.
This will leave the ball in there court to lower the price if they can.

If they don't lower the price, continue calling around, of course the best place to buy it, is from a manufacturer, not a distributor.

Now I realize all this talk is confusing, but wheres some proof, well here is an example of a trichome covered plant:

Attached Images

	faq.jpg (36.4 KB, 17 views)
	flower.JPG (744.9 KB, 9 views)
	cold.JPG (816.8 KB, 17 views)
	cold1.JPG (724.5 KB, 10 views)

Fancy!!!!!!!!!!!!!

__________________
PEACE.
Never stop growing.
Seeds are the future.

You know, I've been sitting here with friends, and talking about this topic.....
and I feel very strongly about the positive effects of cold temps on plants.

Winter is almost upon us, and as a continued research project, I'd like to see what effects placing a plant outside for say an hour a day would have on the plant.

Where I am, we'll be covered with snow soon, I think an hour would be more than enough. I'll be losing the positive effects of the co2, but it would certainly pinpoint the temps as the more meaningful effect on the plant......or not.

Whichever the case, is fine. I'd love to know this for a fact, and if it is true, we would all have to re-think our ventilation systems! lol
Peace

looks like a wee hair fell on that bud in the third pic...lol

__________________
~All threads , posts , and pics. posted by me here are all BULLSHIT and or totally fictional in nature .
I don't grow , nor do I suggest anyone else does due to the possability of serious legal reprocussion~

If it's above freezing the plant will be OK. If not..you'll fry the leaves in mere minutes.

I live where it's cold 6 months out of the year. I've experimented with pulling cold air into my room and dropping nighttime temps to the 40's...and I don't think it makes a difference in potency....it just slows the growth to a crawl, IMO and causes some purpling in some strains.

Of course, your mileage may vary due to road conditions and individual driving habits

Nice lookin trichomes, what are the genetics of the babies?

I also use co2 in my grow but use the bakers yeast in solution to generate a constant supply. I also have a portable air conditioner in my grow room that cools it down to the low 70's and keeps the room dehumidified to right around 25%. Using 3 400 watt mh/hps on the babies and use cfl's to spot light the sides of the plants.

In every thing I've read the scientific community can only speculate as to why any plant forms trichomes. The speculations run the gamut from "it's for defense" to "it's for reproduction" to, and I love this one "it's for communication". Personally I don't give a 'rats ass' which it is as long as I can control it.

You are a pioneer my friend, many have walked this road but none (that we know of) have discovered the truth. All the best of discovery to you!

Yeah I have read where other growers were using air conditioners in there grow room just for the plants.

__________________

I think 68-75 during lights on and 58-65 lights off would be optimal.

It would not slow them down and it would give a good show as for what the lower temps would do.

__________________

For now I am happy with 75-80 lights on and 70 ish when lights are off.

__________________

I guess it really depends on your strain .Think about this also a plant has no real control where it grows in other words if seeds can be tranfered by wind,birds or another way they have to be prepared for almost any condition. So I give my girls a little of everything during there growth never any extreme but a good variety.

I think that a good practice, in moderation of course. Thats why you should use an oscilating fan into your grows, to help mimic mother nature, and it'll strengethen the stems.

You'll never beat mother nature!
Peace

Let me explain some stuff to my fellow tokers or whatever you call yourselves . I feel and think passionatly about my greenery and I let the gift of the creator do what it do. It"s a visual of what life is , a basic reflection of development and nurturing and the fruit it brings. I dont put my girls under a regiment of when to eat , drink be cold or whatever I have dominion over these plants and however my schedule permits thats the attention they get.Don't get the wrong idea I treat my girls with the same love as my own seeds thats why they are so healthy and strong right now and this is only my second attempt of earning a green thumb. I enjoy the pleasures of herbal relaxation and I feel that no person should subject themselves to the ills of what could be by purchasing ,using or distributing what man says is illegal . Keep a safe and loving karma your plants will receive the love so will the forces around you .

it could be that you actually manage to create a positive stress one the plant with that - especially if you do it the last 2 weeks or so. you got the temperature lower during light hours from the under the HPS sitting dryice block and fueling the plant with extra CO2. form that point it would make some sense actually as with molasses.

__________________
Keep the gun oiled and the thumb green!