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Cold weather effect on flowering?

Discussion in 'General Marijuana Growing' started by Omax2652, Aug 30, 2012.


    Omax2652 Member

    As the nights are now beginning to become quite cool I was wondering what effects this may have on a long flowering sativa. As it is now getting down into the low 50s and even high 40s at night will this trigger the plant to think that it is nearing the end of its life cycle and trigger faster flowering? The strain is advertised as having a 70 day flowering period and this is about the maximum amount of time it will get until hard frost. I have heard of people having to flower it much longer (13 weeks +) but that was indoors under constant temps I'm sure.

    Saldaw Active Member

    as long as there is no frost it should be ok. it might turn purpleish too

    chrishydro Well-Known Member

    How many weeks are you in, this is 100 percent natural, most go into flower once the air turn cool. Indoor growers will feed with very cold water to send a signal to the plants to begin flower.

    Mr.Marijuana420 Well-Known Member

    i think its consistent cold weather, that will give plants that extra push to finish but i also noticed it will slow growth quite a bit. one plant i had last year didnt start flower till the 1st of sept, at about week 3-4 the buds didnt get much bigger, and the plant started to finish, with fading leaves, pistils turning, and the buds swelling.. but much earlier (on the week count) than the others. i harvested that one at 6-1/2 weeks, (could of gone a little longer but it was done enough) while the others looked that way at week 8

    imchucky666 Well-Known Member

    Check this out, he posted this yesterday. It may be something you can use to be on the safe side, if you start getting close to your frost.

    Omax2652 Member

    And just how do you reckon I turn the sun off for an extra 4 hours a day? This is guerilla shit my friend.

    chickenpoop Well-Known Member

    What happens to THC when the plant is harvested after the first frost?
    Name Withheld,
    Oneonta, NY THC is not affected by frost. However, the plant's tissue can be damaged. Generally, temperatures below 45?F (7?C) affect the plant. Leaves suffer some damage and need to repair themselves before growth or ripening resumes. This may take a few days of good weather. When cold weather continues for several days the damage is compounded, weakening the plant and lowering its ability to repair itself.
    In order to get back on the path towards maturity, the temperature must rise over 60?F (16?C), along with sunshine to provide energy for photosynthesis.
    When temperatures slips down to 40?F (4?C), leaves, flowers and other plant parts suffer from extensive damage. It takes some time for a plant to recover from this damage, and it is unlikely to do so under normal fall conditions because cool weather is usually associated with cloudy skies. This limits the energy available to the plant so bud maturation and THC production is curtailed.

    -ed rosenthal

    imchucky666 Well-Known Member

    LOL, SORRY, you hadn't mentioned that, and I just assumed you were in pots like mine.
    Wasn't trying to be a smartass.

    leroy69 Active Member

    i have indoor plant and the stem have purple lines... cold weather? also 3 weeks into 12/12 still no buds?

    leroy69 Active Member


    Merlot Well-Known Member

    Sometimes it's the pheno, sometimes they're cold and sometimes they're sick. Giving that you're indoors and the plants looks sweet, I'm going option 1..

    leroy69 Active Member

    yer cheers, cause i accidently grew them to big the light can only get to one side of the plant and thats were there turning purple, the other side of the plant is still green. so im guessing that means its going to bud better one side of the plant

    Merlot Well-Known Member

    Some of mine are pink, some are green, and all grown in same conditions (outside).

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