Apr 11
Wondering if I didn't misdiagnose that "Light Burn". I'm seeing some minor, but persistent, clawing on Oranges #1 and #3, and all girls except Orange #2 have some upward curling along the edges of the leaves. Mango #2 is showing light yellowish-green coloration along the edges of her newer leaves.
I wondered if Nitrogen levels were too high, that's a lot of people's first suggestions with clawing, but the clawing is only happening slightly on the 2 Oranges, none on the Mangoes, growth is not slowed at all on any, in fact I'd say it's still fairly vigorous, and slowed growth is a tell-tale sign of Nitrogen toxicity, along with it affecting more of the leaves than just a few. I've seen almost a word-for-word description matching Calcium and Magnesium deficiency though, so I think that's what I'm (still, increasingly) dealing with as the girls get bigger. I may need a surfactant, because at 5ml/gal of CalMag, and pre-buffering the coir with %150 doses, I don't think I need to increase my Cal-Mag supplementation. Many other coco-growers have said they use this dosage throughout the grow. GH Flora-Trio nutes are still at 1-1-1 tsp/gal and are leveling off at around 800ppm, pH is around 6.2 (raised from the 5.~ that it ends up at after mixing Cal-Mag+Flora-Trio)
After reading up, I plan to decrease water given at each feeding, without decreasing the feedings/day or the hourly schedule. I've been getting larger amounts of run-off than needed to keep the coir at %90-100 moisture. Schedule is still 20/4 light cycle, and watering 4x/day; at Lights-On, 6 hours later, again another 6 hours later, and finally 4 hours later, which is 4 hours before Lights-Off, making it 8 hours until the next feeding at the next Lights-On.
During Flowering I'll have to switch to 3x/day watering, as to not interrupt the dark-cycle of the plants. 3x/day at Lights-On, 6 hours later at "mid-day", and 6 hours later at Lights-Off.
I've raised the lights up to around 22-24in, and spread them apart some. Changed the mounting to secure them a bit more as well.
Humidity is starting to become an issue. If the tent is closed, it almost immediately shoots up to around %61. With the door wide open and a fan pulling air out, it hovers around %55. Going to pick up a dehumidifier from Amazon soon-like. Very soon-like.
Temps have been good at between 70 and 74F.
Saw some dimpling/flat spots along the fan leaves of Oranges #1 &3 as well. Not sure about this texture issue. Will picture these issues, advice is welcome.
Still thinking they are outgrowing their current homes and need the up-potting soon. Started buffering a large batch of coir late night on the 10th and am doing the second buffer late night on the 11th (technically the 12th). Plan to up-pot to 3gal late-night on the 12th after a few rounds of fertigating the buffered mix.
![IMG_20200412_032354930.jpg](/data/attachments/3633/3633125-dd22872d202086d86264bb426107c184.jpg)
Plenty of growth daily, but looking closer there are problems to be found....
![IMG_20200411_185959292.jpg](/data/attachments/3633/3633126-c68bdabaf66cd137b3832b90868e4574.jpg)
yellowish centers on Mangoes
![IMG_20200412_031006178.jpg](/data/attachments/3633/3633127-29f2675c5d56883833420ea7e731ebea.jpg)
Dimpling/Flat spots, scattered around some fan leaves on Blackened Oranges
![IMG_20200412_032225751.jpg](/data/attachments/3633/3633128-9ac294016f653798aa1c5994b430d64b.jpg)
![IMG_20200412_032303401.jpg](/data/attachments/3633/3633130-23a0107ea0a3ba0f52af3dcafca94d0d.jpg)
Rusty colored spots forming on some leaves, seems not to discriminate and affects Mangoes and Oranges both. Not all, but mostly on lower fans
![IMG_20200412_032321997.jpg](/data/attachments/3633/3633131-60b00602bee41e5914938a95e634a19d.jpg)
![IMG_20200412_032338273.jpg](/data/attachments/3633/3633132-128f7c8d1fee6a345cfb76c7a05f5b7d.jpg)
Edges of leaves are curling slightly upward. Leaves themselves aren't taco-ing yet, just the slight curl. Mostly toward upper canopy.
I also had some red stems going on, that's gotten much better though since upping CalMag from 3 to 5ml/gal.
None of it has me too worried, but I would like them to look as healthy as possible and treat any symptoms before they're any more problematic. I just don't know how to treat it for what I believe it to be -- Calcium/Magnesium deficient. 5ml/gal of supplementation should be plenty, and these weeks (4 and 5) are scheduled for 1 tsp/gal of GH Flora-Trio in many grows I've seen. Until I can get some Armor-Si and some Diamond Nectar, I don't know how to make them uptake nutrients any more efficiently. Advice is appreciated, but I know I'm more likely to find it posting in the Help forums...