Calcium deficiency and light stress?

J

johnehazeharvester

Member
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In the top image, I noticed chlorosis on a few of the upper leaves in one of my amnesia haze auto flowers. I was away for one week not monitoring plants. I had water bags attached. I think I may have given only half as much Cal mag as other plants. I think this plant got 1 ml of Cal-Mag, although it may have gotten 2 ml in a 3.5 gallon over the week. I also noted curling of top leaves on the same plant and the lights were only about 11 in from the top. PPFD over 1,000. I raised the lights. Everything looks good today, other than a few leaves with this chlorosis and I did good give 2ml more of Cal-Mag . I think the leaf curling which only occurred on upper leaves of this one plant was likely due to lights being too close. Does this sound reasonable to everyone or did I get it wrong?
 
ProPheT 216

ProPheT 216

Well-Known Member
Need more details. What are you growing in? Whole plant pics. It does look like it was hot and tacoed some leaves. As far as the rest need more details.
 
J

johnehazeharvester

Member
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I use Fox farm trio nutrients. Give approximately half dose every second or third feeding. I also supplement with a tablespoon per gallon of ash from a wood burning stove and PH it with phospheric acid, typically about 7 ml per gallon. My pH is 6.2 to 6.4 after adding acid. Occasionally also give Epsom salt/ magnesium sulfate 1/2 tsp per gallon. This plant got a little less water, two or three liters less than my other two plants in the background. The water bags I used did not water consistently while i was away. I have a gauge to check moisture level in soil and it was not too dry but a bit dry.
I use soil which I prepped with a living soil mix prior to planting. The room was around 72° with relative humidity 45% while I was away. At night temperatures drop to around 65°. I do not supplement with carbon dioxide. I keep PPFD near 1000 as I am in late stage flowering. This is my first grow so just trying to optimize things.
 
ProPheT 216

ProPheT 216

Well-Known Member
So it's likely needing more food as those flowers are exploding, or your soil chemistry is off. Do a slurry test to check soil ec and ph. If your not off on ph or dont have a high ec your girls r just hungry and I wouldn't worry. They don't look bad just get the feeding sorted out
 
J

johnehazeharvester

Member
HydoDan said:
Why the wood ash and phosphoric acid? Just wondering..
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Phosphoric acid is what is in my pH down the water coming out of my faucet is ph 8.1 and when I add wood ash 11 bumps it up higher. In wood ash you can normally we see potash at 10% of the volume of the ash, phosphate at 1% and trace amounts of iron, manganese, boron, copper and zinc. It also contains potassium and I thought it would be good for the blooming phase.
 
J

johnehazeharvester

Member
ProPheT 216 said:
So it's likely needing more food as those flowers are exploding, or your soil chemistry is off. Do a slurry test to check soil ec and ph. If your not off on ph or dont have a high ec your girls r just hungry and I wouldn't worry. They don't look bad just get the feeding sorted out
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Thanks for your input. I will feed it more and see what happens I am not sure how far out I am from harvesting. I did purchase a digital microscope to check Trichrome Color, but I think they are all mostly clear and white. I think I have about two weeks but as this is my first grow I really have no idea. I will post a picture
 
ProPheT 216

ProPheT 216

Well-Known Member
I wouldn't feed it more. I would do a slurry test, and if all good keep doing what I was doing. Growth will slow and they eat less the last weeks
 
J

johnehazeharvester

Member
ProPheT 216 said:
I wouldn't feed it more. I would do a slurry test, and if all good keep doing what I was doing. Growth will slow and they eat less the last weeks
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I will have to look up Slurry test.
Is that checking run off water.
My ppm going in was light for this stage 6-700, but I figured there is still some nuts created by microorganism in living soil.

I mixed old potting soil with perlite and
Super Soil Autoflower Concentrate
Visit the Nature's Living Soil Store


Also I used the below drip irrigation system from Amazon while I was away.
10Pcs Plant Drip Irrigation Bag Indoor Gardening System Kit Watering with 3.5Liter iv Fluid Self Automatic Device with Adjustable Valve Switch for Outdoor Waterer House Accessories Planter Insert
 
HydoDan

HydoDan

Well-Known Member
johnehazeharvester said:
Phosphoric acid is what is in my pH down the water coming out of my faucet is ph 8.1 and when I add wood ash 11 bumps it up higher. In wood ash you can normally we see potash at 10% of the volume of the ash, phosphate at 1% and trace amounts of iron, manganese, boron, copper and zinc. It also contains potassium and I thought it would be good for the blooming phase.
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I understand the benefits of wood ash as I use some in my soil mix.. I've just never heard of mixing it with water and ph down.. I use dolomite to buffer soil ph..
 
J

johnehazeharvester

Member
HydoDan said:
I understand the benefits of wood ash as I use some in my soil mix.. I've just never heard of mixing it with water and ph down.. I use dolomite to buffer soil ph..
Click to expand...
I saw someone on youtube mixing about 1 tblsp ash / gallon water. I read that it increase ph so I just added ph down to get in low 6's. Not sure if this is correct. I read about dolomite. In future I want to get a bit more complex in my soil mix with more organic inputs. Tried to keep it fairly simple for my first grow. I think I will have a decent yield. I will force myself to be patient with the dry and cure.
 
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