Problems with plants. Help.

Discussion in 'First Time Marijuana Growers' started by aeonic, Oct 9, 2007.

  1. Growth stunted on a few plants for a while. Poured too much ph down water once on some plants and the leaves turned brown and growth stunted. Corrected PH to 6.8 now. Water every 2 days, Micraclegro(2 weeks ago), and nirvana plant extract(10 days ago) and nitro fert (5 days ago), i use the fert at 50% of the instructions. Some leaves of the healthier plants are turning yellow.
    I've realised that there were some brown spots on the leaf on the healthier plants .
    60% potting mix
    30% perlite
    10% vermiculite

    PH6.8 , 7.5(before)
    400W HPS
    humidity 35-50%
    Temp 28-31 Celcius

  2. i just checked and the PH is back at 7.5. I use a few drops of PH down to 250ml water at ph 6 and watered the plants, and now its back at 7.5... how do i lower the ph properly?

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