Hello everyone! Haven't been in here in a bit but I need some help in identifying a small developing issue. I had seen last run on only a couple of plants so chalked it up to sensitivity of those, changed the nute run, and it's back.
Running Jacks 3-2-1
Their grow schedule pdf is here:
Coco Coir - prebuffered, rinsed
1.5 gallon airpot
RO water
Plant is currently taking 1L twice a day. pH steady from 5.8-6.2 and right around 715ppm on the 500scale.
Runoff in the 200-30ml range and typically had been 800-850ppm and 6.1pH
Environment: 75-84f and 65-68%rh currently
The Jacks 321 I am running at 80% strength. Which is 3g part A, 2g part B, and 1g epsom salts per gallon. I do bump the epsom to about 1.3g/gallon. I usually see a little Mg def striping on the larger older leaves. Bumping the epsom a touch takes care of that.
The current issue: Last run, I used the Jacks Bloom product, 10-30-20, at the start of flowering. The chart says to use it for a week. A couple of plants developed dark patches on a few leaves that eventually turned into brown rust spots and spread. I had 2 plants that were a few days behind and I only used it for 2-3 days and they did not develop the spotting issue. This run I decided not to use the Bloom product at all and simply run the A/B/Epsom start to finish. I am at about the same point in the grow and the spots are starting to be visible to me again. I know my eyes aren't able to catch things early enough.
I believe this is a phosphorus deficiency? I am considering adding 1/2g per gallon of the bloom product for a few days to see if it helps. I will wait for expert advise before mucking about with the chemicals. I have read online that some people use an MKP, monopotassium phosphate 0-52-34 with the Jacks line going into bloom and adjusting the A/B formula down. Hence my idea to use what I have and add in the 10-30-20 bloom booster. Maybe 2g of everything per gallon? Just for 2-3 days?
Some images:
At day 43 everything looked fine. I am at day 47 now.
Day 43: The leaf that is touching the bamboo pole is one that the issue is very easy to see. Plus this shot shows it well prior.
Same leaf 4 days later: I shrunk the image on the post but if you click it you will get the full size.
Lights off, flash on
Whole plant:
Lights off just using the torch on my phone:
Curious what the pro growers think.
@Mañ'O'Green
@Cave Dirt Cody - I know you run Jacks so if you have an idea I am all ears
Running Jacks 3-2-1
Their grow schedule pdf is here:
Coco Coir - prebuffered, rinsed
1.5 gallon airpot
RO water
Plant is currently taking 1L twice a day. pH steady from 5.8-6.2 and right around 715ppm on the 500scale.
Runoff in the 200-30ml range and typically had been 800-850ppm and 6.1pH
Environment: 75-84f and 65-68%rh currently
The Jacks 321 I am running at 80% strength. Which is 3g part A, 2g part B, and 1g epsom salts per gallon. I do bump the epsom to about 1.3g/gallon. I usually see a little Mg def striping on the larger older leaves. Bumping the epsom a touch takes care of that.
The current issue: Last run, I used the Jacks Bloom product, 10-30-20, at the start of flowering. The chart says to use it for a week. A couple of plants developed dark patches on a few leaves that eventually turned into brown rust spots and spread. I had 2 plants that were a few days behind and I only used it for 2-3 days and they did not develop the spotting issue. This run I decided not to use the Bloom product at all and simply run the A/B/Epsom start to finish. I am at about the same point in the grow and the spots are starting to be visible to me again. I know my eyes aren't able to catch things early enough.
I believe this is a phosphorus deficiency? I am considering adding 1/2g per gallon of the bloom product for a few days to see if it helps. I will wait for expert advise before mucking about with the chemicals. I have read online that some people use an MKP, monopotassium phosphate 0-52-34 with the Jacks line going into bloom and adjusting the A/B formula down. Hence my idea to use what I have and add in the 10-30-20 bloom booster. Maybe 2g of everything per gallon? Just for 2-3 days?
Some images:
At day 43 everything looked fine. I am at day 47 now.
Day 43: The leaf that is touching the bamboo pole is one that the issue is very easy to see. Plus this shot shows it well prior.
Same leaf 4 days later: I shrunk the image on the post but if you click it you will get the full size.
Lights off, flash on
Whole plant:
Lights off just using the torch on my phone:
Curious what the pro growers think.
@Mañ'O'Green
@Cave Dirt Cody - I know you run Jacks so if you have an idea I am all ears
