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    John Curry
    Mar 14, 2021

    6 weeks into flower; getting yellowing leaves.

    in Grow Community

    I use the FF trio...1 teaspoon of each (no nitrogen/"GrowBig") and 1 teaspoon cal-mag, twice per week. Runoff was getting really high so did a complete flush last week. Temps have been 65-80 daytime and mid 50'a night, although we did get into high 40's twice recently...fairly low humidity. Every other day, I mist with ACV or Capt Jacks for aphid control. I'm still probably a few weeks from harvesting...any ideas? Anything to be overly concerned about? Thanks!



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    M
    Mr. Grow It
    Mar 15, 2021

    Can you tell us what the pH and PPM is of the soil runoff?

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    J
    John Curry
    Mar 15, 2021
    Replying to

    That's what's really weird! The Jack Herer was WAY higher (6.8 in 6.2 out and 1600PPM) while the Northern Lights was 6.7 out and 455 PPM! (I tend to feed them the same thing at the same time; the NL is much larger) The PPM readings are suspect because a couple of times the ppm went UP even though no nutes were added since previous watering! (Is this a sign of nute lock?) Assuming it might be, I did a full flush. After flushing the runoff were Jack H: 6.7/511ppm and N. Lights: 6.2/773 ppm. Not sure if it's advised or not, but I did trim and remove most of the yellowing and discolored leaves today. Also, they look like getting close to harvest. Still a lot of aphids (WAY less than before) so plan on doing a "wash" after harvesting. Any suggestions/comments?