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5 responses to “Runoff pH is low growing in coco”

1. 

   jmystro

   07/17/2019

   The reason your run off pH is so low is because the plants are not using all the nutrients you’re giving them. A salt build up will make your coco go acidic quick. This is a very common problem. The pH of your res is very different than the pH of your coco. Both have to be monitored and adjusted. You’ll need to give your coco as good rinse to flush out those extra salts to get the pH up around 5.8 to 6.0. Your plants are getting too much nitrogen also. That’s why the leaves are clawing down and your buds are not very developed.

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   1. 

      Rasta_k_

      07/18/2019

      Thanks for the quick reply. I will continue to flush her until the PH balances itself out. I may just switch to distilled water and skip all nutrients until she shows signs of improvements. The plant has only about 3 or maybe 4 weeks left until its ready. So plain 0ppm water should be fine? I’ll also keep the PH 6.2 going into the medium and keep checking runoff. Thanks again!

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      1. 

         jmystro

         07/18/2019

         After a good flush you’ll need to add some nutrition right away. With your autos in coco, you need to feed a lower ppm everyday.

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2. 

   DreamsInGreen

   07/18/2019

   Jmystro is dead on. I commonly run slurry tests bi-weekly on my coco to see where I’m at. Just mix an ounce of your potted coco with an ounce of distilled water; let it settle out for a few minutes and chuck you pH and conductivity pens right in. That should give you a good idea of where you stand with your coco. Document those numbers so you can measure the uptake rate of the plants which can help you further dial in your solution EC. Autos do not need nearly the EC of photo-period plants. In my early years of growing, I would also incur huge pH swings from letting my coco dry out too much, just some food for thought.

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   1. 

      Rasta_k_

      07/18/2019

      So I do run into some questionable moments when checking the coco for dryness or wetness. This also goes for my 6 other girls which are only in day 5 to 11. I have the only flowering plant which is pictured and its in 1gal container. When i check the media with a meter and it reads dry about 1.5inches down I then go about 3in down and it reads moist. I know water sitting the media can cause issues and root for but thw rule of thumb ive heard so many timea is when its dry and an inch down you should water. Now I only water normally 1liter (4.5cups) of distilled water. I get about half that amount in runoff. Should i be watering more at one time? I go by weight of the plant. After a full water i feel it and look at it, then after about a day and a half it usually needs more.
      Hope this make sense. Thanks

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