My grow is 28 days into flower. Growing 5 different strains.
1.Gupta Kush (65-70 days harvest window)
2.Critical (65-70 days)
3.Poon Tang Pie (65-70)
5.White Widow (65-70 days)
They are all in 5 gal smart pots same medium used which is a mix of Fox Farm Ocean Forest 1.5 liter bag, Happy Frog 1 liter bag, Worm castings about 1/2 liter bag, Dolomitic Lime 2 cups, perlite for added drainage.
Ph run off is 6.9
Temps are mid 70s F, 23/24 C lights on High 60s F, 20/21 C lights off
Humidity is a constant 45 to 50%
600 Watts HPS about 18" to 20" above the canopy
3 of the 5 strains are the only ones that are exhibiting this deficiency. The White Widows are looking fine.
My previous grow with the same medium, pot size etc.. I did not see anything like this and had a great harvest. From research I have suggestions of light burn, magnesium deficiency and/or Zinc or sulphur . It appears to be an immobile nutrient as the whole plant(s) have this
leaf appearance throughout the plant.
I am feeding them with Earth Juice which is a very acidic nutrient and some suggest to bubble the mix for 48 hours to raise the ph but I have reached out to the manufacture of EJ and they say it's not necessary that the microbial life balances it out. As I stated my previous grow under the same conditions didn't experience any deficiencies. I also supplement with Liquid Seaweed and Kelp meal and follow the recommended feeding for all nutrients I water in and I water just plain Ph'd water every other watering adding about a Tbs of molasses. When I water the plants I never water more than 2 quarts and/or 1.89 liters usually every 3 days.
I am freaking pulling my hair out trying to figure this out. Could someone with superior skills on deficiencies please chime in and get me pointed in the right direction I sure would appreciate it. Pictured is a leaf I pulled off the Skunk#1 girl but it applies to the other two strains. As I already mentioned the White Widow don't have leaves like this, they look perfectly healthy. I have read that it could be the strain simulating the plants life cycle (Picture Autumn/Fall conditions how the leaves change colors) but this early into flowering I doubt it total speculation at this point.
Thanks in advance and if there is any info I left out please let me know and I will reply in a very timely manner as I am on here quite a bit.