{"id":8548,"date":"2026-10-21T14:53:00","date_gmt":"2026-10-21T14:53:00","guid":{"rendered":"https:\/\/www.growshopweb.com\/blog\/?p=8548"},"modified":"2026-10-21T14:53:00","modified_gmt":"2026-10-21T14:53:00","slug":"substrate-ph-in-indoor-growing-how-to-measure-it-and-detect-problems","status":"publish","type":"post","link":"https:\/\/www.growshopweb.com\/blog\/en\/substrate-ph-in-indoor-growing-how-to-measure-it-and-detect-problems\/","title":{"rendered":"Substrate pH in Indoor Growing: How to Measure It and Detect Problems"},"content":{"rendered":"

Controlling substrate pH in indoor growing<\/strong> is essential for maintaining healthy roots and promoting nutrient uptake. Learn how to measure it correctly, recognise the symptoms of an imbalance, and correct potential problems before they affect plant development.<\/p>\n

When discussing pH in indoor growing, we usually think about the water used for irrigation. However, another value deserves particular attention: the pH of the growing medium where the roots develop. Even if irrigation water has an appropriate pH, the substrate may have different conditions due to salt accumulation, fertiliser composition, root activity, and the characteristics of the growing medium itself.<\/p>\n

For this reason, measuring only the pH of the water is not always sufficient<\/strong>. Understanding what happens in the root zone helps growers interpret certain nutrient deficiencies, identify possible nutrient lockout, and make better decisions about irrigation and fertilisation.<\/p>\n

In this informative guide from the Hydroponics Blanes<\/strong> blog, we explain how to measure substrate pH in indoor growing, which values can be considered suitable, and the most common mistakes made when attempting to correct it.<\/p>\n

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