Need help diagnosing yellow and brown leaves

Discussion in 'Sick Plants and Problems' started by 420blazeitfamtbh, Aug 9, 2017.

  1. This plant is three weeks into flowering and starting about a week ago I noticed some yellowing leaves lower down on the plant. The leaves are turning yellow and developing brown spots. The tips are also curling up somewhat. Since this started appearing on leaves lower down I thought it might just be old leaves dying off but it has spread to about halfway up the plant. The plant also hasn't stretched much after starting flowering and a friend's plant that it was cloned from stretched a lot. After some research I thought it might be a calcium deficiency but I'm very unsure and would like an opinion of someone more experienced.

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    Some additional details:
    Plant is being grown indoors in soil under a 400W HPS light that is about 50cm away. It is watered with tap water that has its pH adjusted to around 6.5. It is being fertilized with Canna Terra Flores which has an NPK of 2-1-3. Temperature is usually around 25C but can drop down to around 15C or lower at night when the light is off. This plant was grown from a cutting rooted 7.5 weeks ago and has been in flowering for 3 weeks. Strain is "Zombie Kush".

    Let me know if you need any more details or pictures. Thanks.
     
  2. Looks like calcium or manganese.


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  3. How would you recommend I remedy this? Starting yesterday I began giving it some of this fertilizer, but I notice it doesn't contain manganese.

    I'm new to this and don't really know what I'm doing so any help is very appreciated.
     

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  4. I grow in Coir so always add a separate cal/mag to the actual nutes to bump them up and have never had any problems after that but i did have the same leaf thing going on as you . I got mine from Amazon for like £10 ... that's about 50 billion dollars or something ;-D .
     

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