Need some help, brown spots

Indoor Growing Climate
1

Question from a fellow grower:

Message : Hello I received the seeds and they all sprouted, tomorrow makes 3 weeks and on a few of them I’m noticing small brown marks at the tips, one is growing a little twisted and on one theres a small brown circle. Should I be alarmed? I uploaded a Pic for you to see, thank you I have other pics as well if you need me to send gem in.

20200218_113723-c3d01508-c635-4297-970a-4888bd69320b
20200218_113723-c3d01508-c635-4297-970a-4888bd69320b1154×866 271 KB

  • Strain: blueberry, purple Kush, purple tw
  • Type (fem/auto/reg): fem
  • Climate (indoor/outdoor): in
  • Medium (soil/hydro/details): coco/perlite mix
  • pH of runoff or solution in reservoir: 6.2
  • Nutrient mix strength (EC/TDS): n/a
  • Light type & schedule: 18/6
  • Temperatures day & night: 70 night, 82 lights on
  • Humidity day & night: 40 night, 50-70 lights on
  • Ventilation:
  • AC: mini split
  • Humidifier: no
  • De-humidifier: no
  • Co2: no
2

Hey there, welcome to the forum.
Do you have a picture in natural light? The purple makes it difficult to tell whats happening.

1 Like
3

Possibly just a burn from a water droplet on plant. When watering try not to get water drops on leaves as the light will be magnified and burn the leaf.

4

If you zoom in, it doesn’t look like water on the leaves. In the blurple light it kind of reminds me Cal-mag deficiency.

5

That’s to high for coco. You wanna be at 5.8