S=Answer if you grow traditional soil

E= EVERYONE needs to answer lol!


E-indoor
E-soil
E-specific medium - perlite@15%,bone meal@5%, composted worm castings@80%
SCL-Anything you have added to the soil - nothing
SCLR-Soil or slab runoff pH = 7.0
E-Water source - tap water
E-Source water pH - unknown
E-Age of plant - 3 months
E-Type of fertilizer - none
E-Rate of application (if hydro, this is your PPM number, preferably after each component is added) n/a
E-Lighting source and distance from plant - metal hallide and SO
E-Air temperature (both day and night if you are running a dark period) 75/69F
HD-Reservoir temperature - n/a
E-Air % Relative humidity - 35-41%
E-Lighting schedule - 12/12
E-Type of ventilation your room has - fans
TR-Did you pre-soak your media in pH corrected solution? - no

We've had a new problem (to us). Reddish-brown spots are appearing in the center area of the middle leaves in our veg room. These are dead tissue, and the affected leaves show curling. Doesn't seem to me to be an insect or nutrient problem, but I don't know how to diagnose or treat this slowly spreading.....