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Thread: Could this be Phosphorus...?

  1. #1

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    Default Could this be Phosphorus...?

    My Lowryder has developed what I think may very well be a Phosphorus issue, she's not long into flowering 2.5-3 weeks give or take a day.
    She's in a 7.5 litre pot with unbranded general purpose peat free "Green Waste" (high in Nitrogen) based compost, I'm feeding with Bio-Bizz Organics, Bio-Bloom 4ml/1.5L, infact I've fed the Lowryder less than my Auto Lemon Haze and that hasn't had any problems at all... Well, apart from the usual yellowing considering shes 4 weeks into the flowering cycle, and they are only one or two of the smaller fan leaves at the bottom anyway... I digress!
    For some reason the Lowryder dosen't "appear" to be doing much, which is strange considering it's about 4 foot tall (probably all that Nitrogen in the "green waste" compost), it has also been hitting 50°C in direct sunlight too in my back yard as there is no shade anywhere until mid afternoon. So, at first I was thinking maybe some sort of heat strees (I removed another leaf which started out in exactly the same way, directly opposite the one in the photo, but it wasn't displaying the discoloured patches at the time), then the Black/Brown patches started to apper, which now makes me think Phosphorus...?
    Any help/advice greatly appreciated...

    Click image for larger version. 

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  3. #2

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    It's either over feed or over watered. JMO

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    If it’s just that one leaf I wouldn’t stress about it
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    I forgot to add, there's no purpling to the stem or leaf stems, yet...

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    Bio-Bizz base nutes are formulated to be used in conjunction with each other, you still need to use the grow component along with the bloom in the flowering phase because it contains micro elements...Check the current feed guide though as they may have changed it since last I looked..Flush the pot 3x the pot size with plain water then once the medium has dried out in 2 or 3 days start to feed as per bio-bizz feed instructions...Better still dump the bio-bizz and switch to plant magic old timers, it's more user friendly and a much better product in my opinion...


    Regards BL

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    50C!! and I can see a white reflective brick wall in the background and that will bounce heat back to the plant. Im surprised it looks as good as it does. No wonder you're having problems. In our summer I regularly suffer shade temps of 35C but in the open sun it can register 45C to 55C. I've actually walked in a salt pan that registered 65C in the truck with the windows open. You MUST find a way of getting that leaf exposure temp to less than 35C. Otherwise you'll never have a solution to any other problem. Use shade cloth, leafy twig branches in a 'tent" or what ever. But until you get that temperature down you'll lose. No point in messing around with nutes and water if ya dont get that temp down. Any plant of any kind can't suck up enough cooling water to replace the water it transpires at the temperature - unless its Australian saltbush. 50C in the sun, that's Sahara Desert or Death Valley stuff - in winter!

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  13. #7

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    Quote Originally Posted by doleritejack View Post
    50C!! and I can see a white reflective brick wall in the background and that will bounce heat back to the plant. Im surprised it looks as good as it does. No wonder you're having problems. In our summer I regularly suffer shade temps of 35C but in the open sun it can register 45C to 55C. I've actually walked in a salt pan that registered 65C in the truck with the windows open. You MUST find a way of getting that leaf exposure temp to less than 35C. Otherwise you'll never have a solution to any other problem. Use shade cloth, leafy twig branches in a 'tent" or what ever. But until you get that temperature down you'll lose. No point in messing around with nutes and water if ya dont get that temp down. Any plant of any kind can't suck up enough cooling water to replace the water it transpires at the temperature - unless its Australian saltbush. 50C in the sun, that's Sahara Desert or Death Valley stuff - in winter!
    I know Doleritejack, it dosen't usually hit 50°c here in the UK, I do drape some green scaffold netting down behind them to try and combat the heat reflection, hence the reason they're double potted too, to keep them off the hot patio slabs, but they're in the best corner in my yard to grow, as it's tucked away out of sight behind my conservatory and it's a proper old sun trap, but this heatwave we're currently having is being a right old pain!

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    Quote Originally Posted by Bud Lightyear View Post
    Bio-Bizz base nutes are formulated to be used in conjunction with each other, you still need to use the grow component along with the bloom in the flowering phase because it contains micro elements...Check the current feed guide though as they may have changed it since last I looked..Flush the pot 3x the pot size with plain water then once the medium has dried out in 2 or 3 days start to feed as per bio-bizz feed instructions...Better still dump the bio-bizz and switch to plant magic old timers, it's more user friendly and a much better product in my opinion...


    Regards BL
    Thanks for that bit of info about the bio-bizz nutes Bud, of course it means that I've just learned that I've been using Bio-Bizz wrong for years...
    Good job you popped your head through the door chap...

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    just like buzz said most switch nutrients to early,
    whilst the plant is in the early stages of 'flower' is when grow is needed the most

    if it's just a few leaf spots low down i wouldn't worry, those lower leaves will all drop off in a few weeks anyway
    plant is looking nice and healthy so far

    keep it up and you'll be smoking her in no time

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    Long time no see Monster, I hope things are good with you
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