Brown spots on fan leaves

Soil in 5 gal smart pots

System type? Organic

PH of runoff or solution in reservoir?6.8-7.4

What is strength of nutrient mix? No nutrients compost tea

Indoor or Outdoor, INDOOR grow

Light system, size? Kind led xl750

Temps; Day: 82-85 Night 72

Humidity: day 45-50 night 60-70

Ventilation system; 6 inch filter 390 com fan 2 6 inch oscillating fans

AC, Humidifier, De-humidifier, ac, and humidifier


Co2; 12-1500 ppm tank, regulator, and controller

Plants are getting brown spots not sure what to do. Please help.

Welcome! To me it looks like calmag deficiency. @PurpNGold74 what do you think?


I appreciate that randomlyran

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Have you splashed any of your “tea” on the leaves? That could be it


I didn’t consider that. I don’t use tea for Canna purposes but is very strong. Very well could be it.

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That’s possible. Only a few leaves affected but they seem to be progressing. I’ll keep watching


Thanks for the tag @RandomlyRan. And good call @HornHead… Its kinda random so more then likely leaf got wet…

That 7.4 ph is a recipe for lockout, and will make all kinds of deficiencies bubble up… Try to bring it more into the 6.4-6.8 range if possible…

@Eastcoastbudz… hows the progression?