Week 5, NL Auto, Brown spots and some red stems. Coco coir + Pelite (70%/30%), RH 60%, temps 22~26 Celsius, watering every 1~2 days 2.5L. GHE Flora Series, 1ml/L of each bottle (Micro, Grow, Bloom) and 1ml/L of Cal-Mag. EC 1.3~1.4, pH 5.7~5.9, watering until 10~20% runoff. 
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How tall should seedlings be to be considered healthy and good? One of my plants (#1) did not stretch much during first week and I'm afraid this could impact on her growth on veg stage. 
This is my first ever grow and I need help and some tips to get though it please, they are both autos and 2 didn’t germinate because I watered the whole pot 1 day in advance... obviously not smart but we learn 
