Could these DARK Brow Spots be Leaf Septoria?

Ice-R

Member
Hi,

I am on my 3rd grow in the 7th week and since two days dark brown spots have appeared on one of my plants (4 in total). it started with one leaf and is now on 5/10 leaves on that one plant. i am wondering if it could be Leaf Septoria as some of the symptoms seem to match but so does phottasium defficiency

a bit about my setup


  • Growtent 0.8m x 0.8m with 128 watt LED ate 30 cm distance
  • 4 plants in soil (11 L containers)
  • Amnesia Haze Autoflower
  • germinated on 13-10-2020 on light: 18/6
  • started using canna terra vega 25ml/10LT and last week shifted to canna terra flores 25ml/10lt (both 50% of recomended by manufacturer, because of them being auto flowers).
  • Temperature has been between 19 - 24º C and 50/60% humidity
  • Airvent on 24/24 + ventilator
Last watering of this plant 25-11-2020
Feeding water: ph 5.8 ppm 435
runofff water:ph 6.25 ppm 695

As i understood that in case of Leaf Septoria i need to remove affected leaves asap i need to diagnose this quickly.

Any help greatly appreciated.
 

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