is this a Mag deficiency? This usually doesn’t happen to me until well into flowering I’m growing in FFOF I just upped the last feeding and also gave her 2ml/gal of Calmag Thanks for the help!
Green Planet Medi One, Calmag, Recharge
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yes mate looks like Mag Def.... try foliar feeding some epsom salts and that will usually fix things 
Agreed. I generally give 5 ml per gallon of cal/mag plus some epsom salts once a week or so. As long as you flush a few times throughout grow that works wonders! And as an added bonus, the sulfur in the epsom salts are used by the plant to make secondary metabolites, like cannabinoids and terpenes!
Hey @GrowDad, looking at some of your numbers, your air temp is a little high at 80 degrees. Try 75-77 degrees, I've found that when they start getting around 80 and above they start getting to warm and slow down. Mine seem to like it just a little cooler. The other thing is your humidity is 40%. I don't know how old they are but I would keep them around 55%-60% till the last 2-3 weeks of flower then pull out that 40% RH and that will be fine then. Their color looks light so maybe they're hungry all across the board. But as mentioned above the cal/mag should help to darken things up some. Hope this helps some.
Thanks for all the info everyone.
I’ve been under-feeding them so I definitely think that’s an issue. I thought the FFOF would have supplied more nutrients during the re-pot. I’m going to increase the cal—mag to 5ml/gal and get some Epsom Salt tomorrow to make a foliar spray.
I’ll keep an eye on the temps but this is where I’m usually at. The humidity is low because of the dry southeast winters but may need invest in a humidifier especially when I harvest. That drying tent got to dry for my liking last run
@growdad I feel your pain on the dry southeast winters.... You can make an easy humidifier with some bowls of water and something to wick out in between them with a fan blowing on it. I use rope wick but you can use a washcloth with one end in each bowl. Helps me when I have issues.
@growdad you can also use a swamp cooler to help raise humidity and lower the temps, same idea as using the towel and bucket method but a cleaner option, living in aus i use the A/C and swamp coolers to regulate the overall humidity and temp, recently its been an absolute nightmare with our aussie heat however the plants can cope with higher temps if the humidity level is up, most of the time high humidity in flower is a concern if you have lack of airflow or stale airpockets in the grow area. if running higher temps you can get away with higher humidity and if you look at most VPD charts the closer you get to 30c the more your looking at 60%+ humidity levels to keep the VPD in the green, just keep the air moving around the tent/ grow space and you shouldn't have an issue.
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