They are alive! First one is Girl Scout Cookies auto extreme from ILGM, second one is OG Kush auto from Humboldt Seeds.
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Question did you start the plant with a plug or direct sow in coco. Looks like direct sow
@Mpower11 Direct into coco, I don’t have any plugs. I have some non-Grobo coco pods on order that I will be using to germinate in the future.
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They are both growing nicely. No signs of nute burn or deficiencies yet.
Res pH 6.0
EC 0.8
Changed water in res today:
pH 6.1
EC 0.9
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Looking like a nice start
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There looks like some yellowing in the leafs or is that just the picture?
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There is some browning on the first one, temp in the tent got a little extreme yesterday, reached ~80 degrees during the day and was down to 61 before I turned on the heat. The pH was a little high when I checked it this morning, so I did a flush and made sure the pH was at 6.0. Another thing that I didn’t notice right away was the humidifier was aimed at the first plant, so it was getting way too much.
The brown tip on the first one was directly in the path of the humidifier. I suspect it was a combo of that and the pH creeped up to 6.4 overnight.
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I am a little surprised with the GSC, the first one I grew in my Niwa with rockwool had zero issues and I never monitored EC. I dont think I could have killed that one if I tried. The GSC seeds are 5 months old, so that may have something to do with it, or it’s just genetics.
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One possible thing to think about is you said you were feeding a Ec of 800 or 900.
From my experience that’s pretty high on a baby seeding.
Looks burned to me a bit
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When you say Ph creeped up to 6.4 in the res you mean or leach?
Next time you water collect some leach water and test your EC and Ph… See where your at…
Something is off I’m thinking Magnesium Deficiency
Did you charge your Coco media with Cal/mag?
But I still think your feeding to high in nutes for a seedling / missing Cal/mag
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Yeah, the reservoir water pH was creeping up. I ordered a Bluelab pH and EC meter for my reservoir.
I flushed both plants last night with distilled water mixed with Cal-Mag. The burn doesn’t seem to have gotten any worse. Going to keep a close eye on them for the next couple days, along with the pH and EC in the tank.
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6.4 for Coco is on the high side of ok still
Thats a nice meter
I think it was a good idea to flush both plants with Cal/Mag… If they were my plants I wouldn’t feed any nutes for a few days just Cal/Mag.
When you flushed did you get a reading of the leach and Ph (the first run off water)
That’s exactly what I am going to be doing. Leech EC was 0.5, can’t remember what the pH was, it was a little on the low side from what I remember. Think like 5.7
This is good information
5.7 is still ok for Coco it’s in range
Based on this info I don’t think the problem was caused from PH…
Still thinking cause was one or both (Cal/Mag / high nutes for baby seedless)
Let the coco dry out good before you water again
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Was thinking more along the lines of it being a bit low for Cal-Mag absorption.
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I agree if I had to pick…
Did you charge the Coco media with full strength Cal/mag?
I flushed it three times with full strength cal-mag.
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6.) Magnesium Deficiency
Symptoms
Yellowing in between the veins on leaves, often located lower down on the plant.How Do Growers Get It?
How to Fix
- First check the pH. It should be in the 6.0-7.0 range for soil growers and 5.5-6.5 for everyone else.
- If a Magnesium deficiency persists, consider getting a CaliMagic supplement that is made for plants (you should always add Magnesium and Calcium at the same time because these two nutrients work together in the cannabis plant).
- Learn more about Magnesium deficiencies
With a magnesium deficiency, the yellowing happens between the veins of the leaves, while the veins stay green.
Sometimes Triggered by Old Age / Natural Senescence / Light Deprivation
- It’s actually normal if you only see these symptoms on a few leaves at the bottom of the plant that are no longer getting any light. The plant eventually “gives up” on old leaves if they spend days or weeks without light, which often happens to the lowest leaves at the plant gets bigger. This may look like a magnesium deficiency.
- If this is the case, the leaves often seem droopy, limp and tired. These leaves don’t “stick straight out” like normal leaves because the plant isn’t wasting resources by putting energy into them.
- This is most common when using relatively weak grow lights like fluorescent lighting or CFLs, since the light doesn’t easily reach the bottom of the plant.
- Therefore this symptom is only something to worry about if it’s happening on leaves that are still getting light, or if you’re seeing the symptoms on many different leaves instead of just an occasional leaf here and there.
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