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I started to notice very early symptoms of some deficiency on the front plant, I only took EC readings after watering to ensure I was always reading moisture-saturated soil at the same baseline. The EC in and around the plants near the door had much lower EC than plants at the back and were slower to develop, after allowing plants near the door to "fast" for a few days I noticed plants that still had the EC of around 0.9 were still developing well, gave them the time they needed to catch up. At least it felt like that. Still learning a lot as I go.
It is commonly said that an ideal soil is 50% pore space (water + air), 5 % organic matter, and 45% minerals.
The ideal mixture for plant growth is called a loam and has roughly 40% sand, 40% silt and 20% clay.