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So my northern light auto has grown great until 2 weeks into flowering. First issue was top leaf edges turning yellow now I have brown patches on alot of top fan leaves. This happened before on last grow. I've flushed it yesterday with phd mag cal. Before this I was phing around 5.7 but decided...

hi how do you convert nm to cm? I've attached a spectrum Graph and want to see if I can work out actual distance of lights for different stages but says nm and want to convert to a measurement size...

First time grow inside when horribly wrong in flowering with top leaves yellowing. I tried to fix with magcal and lifting lights but didn't work so I'm not left with much but its been fun. Is this ready to harvest? I've flushed a few times with pH water? The reason why I ask is because the buds...