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You could add a gram of gypsum for calcium.
Is this a burn or a deficiency worth addressing?
- Thread starter terp182
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Thanks! Some is on the way. I re-fertigated with ~480 ppm 6.1 pH with 2 mL/gal CalMag (since I don't have gypsum yet). Runoff was 450ish at 6.1. Appreciate the encouragement to muscle through her stress! The other two plants are taking off right now, and the light is up to 75% with humidity coming down to 50ish, so all the variables I can think of are dialed in as far as I can tell.
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I think "50% nutes" might have meant a bit less than that.. maybe around 300 ppm / 0.6 EC. But interesting to see how she takes that last fertigation.
The Zamaldelica Express is still growing and throwing bud sites, though she’s showing cal deficiencies with brown spots on leaves, in addition to yellowed leaves. She looks more healthy than unhealthy overall, and I’m trying to leave her be and adjust to the 80% lights and slightly stronger nutes. But now, my CDLC is showing signs of something similar on its lower leaves, starting to creep up the nodes.
I’m really trying to learn to read the plants and suspect some sort of lockout, under the assumption from earlier that 2.5-3 mL/gal Botanicare CalMag is too much mag for the MC. I filled the res with 5 gallons of 560 ppm MC/CalMag (3.0g/Gal MC with 2.5 mL/Gal CalMag). I should note the Double Grape also on the same res continues to thrive unabated. Res and indiv pots are at 560 ppm and 6.1 pH.
I now have Gypsum in hand. My question is, should I add some dissolved gypsum to the existing 4.xx gallons in the res, and maybe bring the ppm down to 500ish, or is there another thing I should be looking at here? And is 1g/gal a good amount of gypsum to start with? Thanks so much. The first two pics below are the ZE, the last three are the CDLC.
I’m really trying to learn to read the plants and suspect some sort of lockout, under the assumption from earlier that 2.5-3 mL/gal Botanicare CalMag is too much mag for the MC. I filled the res with 5 gallons of 560 ppm MC/CalMag (3.0g/Gal MC with 2.5 mL/Gal CalMag). I should note the Double Grape also on the same res continues to thrive unabated. Res and indiv pots are at 560 ppm and 6.1 pH.
I now have Gypsum in hand. My question is, should I add some dissolved gypsum to the existing 4.xx gallons in the res, and maybe bring the ppm down to 500ish, or is there another thing I should be looking at here? And is 1g/gal a good amount of gypsum to start with? Thanks so much. The first two pics below are the ZE, the last three are the CDLC.
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Looking at the plants again today and various guides, it looks like the CDLC is Manganese deficient. Lots of brown spots on lower yellow leaves which quickly harden.
I added about .75 g gypsum diluted into a gallon or so of water to bring the ppm of the res from 565 to 490. pH is 5.9. The CDLC and ZE both look less than happy. And I feel like I'm possibly making it worse with the earlier low ppm megacrop and calmag 3mL/gal flushes.
I'm going to give them a few days at 490 ppm and see how they respond. I really wish there was a solid baseline to refer to regarding megacrop dosing and calmag supplementation (or not). A couple people who were a few weeks ahead of me in megacrop autopot grows both had similar issues, so now I'm not sure how to best get these girls to the finish line.
I added about .75 g gypsum diluted into a gallon or so of water to bring the ppm of the res from 565 to 490. pH is 5.9. The CDLC and ZE both look less than happy. And I feel like I'm possibly making it worse with the earlier low ppm megacrop and calmag 3mL/gal flushes.
I'm going to give them a few days at 490 ppm and see how they respond. I really wish there was a solid baseline to refer to regarding megacrop dosing and calmag supplementation (or not). A couple people who were a few weeks ahead of me in megacrop autopot grows both had similar issues, so now I'm not sure how to best get these girls to the finish line.
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