What’s the best pH for cannabis in DWC?
The answer: 5.8
A practical target for DWC and RDWC, with room for normal pH drift.
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Why
Target 5.8, and let normal drift work for you instead of chasing the number all day. In DWC and RDWC, pH controls how available nutrients are to the roots. As pH climbs, nutrients such as iron, manganese, and phosphorus become less available. If pH drops too far, micronutrient toxicity and nutrient imbalance become more likely. A practical operating range is about 5.6 to 6.1. If you move outside it, make a small correction, let the system circulate, and test again.
What to remember
- Target 5.8, but normal drift is fine.
- A practical operating range is about 5.6 to 6.1.
- High pH reduces availability of several nutrients.
- Low pH increases the risk of micronutrient toxicity and imbalance.
- Make small corrections, circulate the system, then test again.
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