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PH drifting below 4, by middle of flower. Soilless(Agro A5-HP), watered when dry
Basementganjastarted grow question 5y ago
Middle of Flower - Runoff PH has drifted below 4.. detected during the first watering of 2.5 gallons (10% runoff)
6gallon pot.
Previously watered/fed with 1 gallon of 1tsp/gal GHE Floranova Grow(in veg), then Bloom (after week 2 flower).
Input PH has always been between 6-6.5
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the_canna_scientistanswered grow question 5y ago
Left over nutrients in the media are acidic, so when you feed, they get left in the media and then this dries in the media. When you water again, it re-solubles the nutrients , lowers the PH of the water and your runoff, while redepositing more nutrients into the media to start the process all over again. A solid flush will remove the dried nutrients and allow you to place more nutrients into the system at the proper PH.
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