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It's The Calcium Stupid!

Discussion in 'Sick Plants and Problems' started by NthDub, Apr 28, 2023.

  1. #1 NthDub, Apr 28, 2023
    Last edited: May 2, 2023
    Firstly, if anyone says "Oh yeah, I could of told you that", you know what you can do with your opinion! :D
    For anyone in very hard water areas:
    I've only done a few grows & every time no matter what I did, the leaves started to yellow early in flower & died
    I've asked here & on other forums for all my grows, & everyone said it was magnesium def, PK def, nitrogen def & nothing worked.
    I live in a very hard water area, & my water has 338ppm (if I phrased that correctly?), which means my water is basically liquid Calcium & Magnesium
    The simple solution that has taken me too fu**ing long to discover & ruined all my grows :mad: is the huge amounts of calcium in my water, is locking out the phosphorus & the plant is eating itself in flower
    I've been hammering my grows with magnesium & PK boosters & I couldn't work it out
    It'll take me a while to get the cash together to buy a good Reverse Osmosis System for under my sink
    It's too late for yet another grow
     
  2. #2 waktoo, Apr 29, 2023
    Last edited: Apr 29, 2023
    ... and probable alkalinity as well.

    You may want to take a few moments to research "irrigation water and alkalinity".
     
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  3. #3 ohspyro89, May 1, 2023
    Is this like a week 4-5 of flower die off?

    What NPK ratio were you feeding since going to 12/12?

    The reason I ask is that week 4-5 is common for me to see leaf issues and drop. The fix for me was using a different NPK ratio that's more suited for veg.

    I live on a big limestone shelf and the water is laden with calcium carbonate.
     
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  4. #4 NachoGrande, May 1, 2023
    Not sure where u r but I get my r/o water from an ice machine 1$/5gal
     
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  5. #5 NthDub, May 2, 2023
    This is in about week 3 But it gets really bad, really fast.
    I've tried literally everything.
    Changed from AN to BioBizz
    Added calmag & Epsom Salts
    I'm giving them 1ml of Bloombastic per litre of water every watering. It has an NPK of 0-20-21
    I'm trying to get the money for an RO system for my next grow
     
  6. #6 NthDub, May 2, 2023
    unfortunately we don't use ice machines. You can obviously buy bags of ice in the supermarket, but I wouldn't know what kind of water it is
     
  7. #7 ohspyro89, May 2, 2023
    Have you always went straight to bloom nutrients when you switch to flower?

    Week 3 is congruent with what I was thinking. Have you ever considered using Veg nutrients into flower if not all the way through?
     
  8. #8 NachoGrande, May 2, 2023
    Obviously you would not use ice on your plants. :rolleyes:
     
  9. #9 NthDub, May 2, 2023
    I have only grown auto's, & I wait until white hairs are showing & I switch from Fish Mix to grow & I start with half of the recommended doseage of that & the flowering nutes.
     
  10. #10 ohspyro89, May 2, 2023
    Gotcha. From my own experience, I had those issues and sticking with veg nutrients through flower helped a ton. I don't use bloom whatsoever anymore as it seems to screw things up more than help.

    What you can do is calculate the ppm of nitrogen and aim for ~160 for flower. That's a good low starting point that's worked for me.

    Also, the city just released their annual water report. Your city will put out a water report that may be worth looking at. My water has a TDS of 160, calcium 45 ppm, sodium 13, chloride 14, Ca Hardness 112 and pH ranges of 6.2-7.8. I'm curious what your numbers are like. You've definitely got a higher ppm.
     

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