Sorry new grower first grow, new leaves also have their tips a bit yellow. Regular led bulbs not the fancy grow lights total around 400 watts 70 cm above canopy. Temperature 2t celcius humidity 60 percent. I can't figure out if it is a defecincy or heat light stress I had the lights lower before recently raised but then again new leaves are being affected. Fed plants once with baby bio the only thing I could find out here for veg with high N so I don't know... Please help out
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Go here mate, experts on there who should be able to help you right away