Burn or deficiency?

Ja es ist cocomix und Dünger von Biobizz. Der ph war bei 6.4. Habe an einer anderen Pflanze nach dem Gießen ähnliche Symptome bemerkt und nochmal mit ph 6.0 gegossen. Die lila Flecken sind dort inzwischen verschwunden. Danke.

The first picture shows fairly typical damage caused by the leaf touching the surface of the substrate and is not really something to be concerned over, it will not affect growth rates, potency or yields. Some strains have naturally occurring purple/reddish leaf stems and I very much doubt that there could be an excess of nutrients this early in the plants life. Hope this helps, Organoman.

Need more specifics. Are you growing in coco? Looks like it. Would say ph in coco is likely too high. Measure run off ph . Plus coco needs to stay moist while grown in. Good luck 🌱