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New Leaves Turning Purple!!!

Discussion in 'General Marijuana Growing' started by ManInTheShed, Feb 26, 2007.


    ManInTheShed Well-Known Member

    On some of my young plants, the newly formed leaves comming out from the centre are turning a slightly purple colour, they are all doing it, so maybe it is genetic. COuld somebody tell me what they think this might be please, i dont want them to die!
    My temperature ranges from 77-90 (day) night it falls down quite far to around 60-67.
    Humidity is 40 - 55 (day) and night 45-50. (i think)
    do these sound ok to you, because i have spent all my money on lights and fans, and still it isnt changing that much. will they be ok?
    I have put some homemade co2 in there, if that helps at all?

    TheresNoLuckLikeBudLuck Well-Known Member

    Maybe if we could get some pics, but in the meantime is it just the tips, or the whole leaf, and how purple is purple.


    cali-high Well-Known Member

    yes. t most likely is the strain because the temp are preety normal. 90 degrees is pretty hot.but other then that it sounds great.
    Garden Knowm

    Garden Knowm The Love Doctor

    Is the plant growing fast?
    Are each new set of fan leaves larger than the previous set?
    What color is the stalk?


    ManInTheShed Well-Known Member

    The plant is growing pretty fast, but could be growing faster, surprising as it is under hps.
    The stem is a brilliant green and the leaves are a great lime green colour, but the middle of where the new set of leaves are sprouting from are turning slightly purple, it looks natural though i may be wrong. each new set is slightly bigger than last set.
    It doesnt usually go to 90. only occasionally.
    thanks again

    ManInTheShed Well-Known Member

    No its not the tips of the leaves, it is the start of the leaves to about half way thru it. it is not to purple, but you can tell it aint green! I think it is genetically normal as the ice strain does tend to have purple characteristics.
    What does purple mean in plants???
    coz people say 'yeh my stems have gone purple and everything' that hapend to me, but only lasted a few days when they were very small.
    Is purple bad?

    cyphercrash Well-Known Member

    Nitrogen Deficiencies:
    Plants will exhibit lack of vigor, slow growth and will be weak and stunted. Quality and yield will be significantly reduced. Older leaves become yellow (chlorotic) from lack of chlorophyll. Deficient plants will exhibit uniform light green to yellow on older leaves, these leaves may die and drop. Leaf margins will not curled up noticeably. Chlorosis will eventually spread throughout the plant. Stems, petioles and lower leaf surfaces may turn purple.


    Contributed by: Nietzsche

    W33D Well-Known Member

    Mine are alos turning purple, the 2nd set of true leaves after the cotyledons are shading to a light purple. No idea of it's genetic or from envrionmental conditions, but Phorphorus deficiencies or too cold of temperatures can cause purpleness in the leaves and stems.

    cyphercrash Well-Known Member

    heat too, I think

    W33D Well-Known Member

    Yeah or heat, but I think and hear some purpling is to be expected in young seedlings, if its still there in 2 weeks you got a problem.
    Garden Knowm

    Garden Knowm The Love Doctor




    green_nobody Well-Known Member


    cyphercrash Well-Known Member

    Too much temperature fluctuation. from 60-90 deg... Ouch Control the temps more better

    nightfun Well-Known Member

    i'm in the same boat with temp. your issue is the cold. my room went from 65 to 88, i fixed this by regulating the amount of clean cool air coming in. timers worked wonders

    cheebs365 Active Member

    Cannabis indica 'atropurpurea'

    You should be happy ;)

    ddot773 Well-Known Member

    ive had that happen to me with one of my alaskan ice plants but as the leaves grow theyll turn green. dont worry bout it

    chrisfuller1 Member

    i dont think its a problem, I know exactly what your talking about too. the new growth turns purple, yould notice it will go away and may even reappear later in the plants life on new growth aswell. i dont know what it means:( possible cold temps but i dont thinks its a problem

    GreenGurl Well-Known Member

    This is my first grow and I was wondering the same thing about my new babies... Here are some pics of them 11 days since planting them ungerminated in pH adjusted rock wool. The ventilation needed to keep the cab between 74-79 is requiring me to water twice a day (6.0 pH plain water).

    What do you all think?

    PS: I'm a total newb and will appreciate all of your sage advice. Random BS-ers can kick rocks, I'm here to study reverently. kiss-ass

    Attached Files:


    wiseguy316 Well-Known Member

    could be mag def, could be a purple strain. we all have no idea without any pics

    Frenchhorn Member

    most likely is a purple strain

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