Hungrig oder Calmag Defizit?

Hi, I'm sure you don't have a CalMag problem. Calcium deficiency often shows up first on young leaves with yellow spots and brown edges. With magnesium deficiency, the symptoms start on the lower leaves first, turning yellow and showing chlorosis (chlorophyll deficiency). The leaves begin to curl inward and will soon die off. I tend to lean more towards a slight potassium deficiency. Potassium deficiency can lead to brown spots and burnt tips on the leaves. The purpling of the leaves happens when chlorophyll breaks down and detaches from the plant's structures, causing anthocyanins to accumulate, which gives the plant purple, blue, and red hues. Even cannabis plants with low levels of anthocyanins often change color towards the end of the flowering cycle. They actually look good, just give them a bit more food but don't overdo it. If you're watering with EC, then around 1.4 to 1.6.