Nutrient deficiency/What is going on?

Tangerine_

Tangerine_

Well-Known Member
Jamesbong96 said:
Could anybody have a clue what this plant is trying to tell me in terms of deficiency? I’m not super confident I know what’s going on.
I’m in a hydroponic set up, so obviously the whole garden is fed the same with the same PH.
Thank you
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More info is needed but from visual alone, it looks like the pH could be drifting out of range.
 
Jamesbong96

Jamesbong96

Member
I should also include that they are ripping through nutes insanely quickly leaving behind a lot of water at a very low salt concentration. It drifted from 500 down 100ppm over 36hrs. The PH is stable at 5.8 occasionally moving plus or minus .2.
the environmental conditions are 82 degrees, 68 percent humidity, and 850ppm of CO2.
12 gallons buckets under 3 phantom 630s
 
MrGreenFingers99

MrGreenFingers99

Well-Known Member
You got some pics of whole plant? Is it just at the top? What's the distance of your light at? Those serrated leaf tips curling in is usually heat stress so maybe lights are to close causing the burn but need more info
 
R

RainmakerJ

New Member
Looks like heat stress - check the leaves for meaty feel - they might be too brittle and dry. Also 68% humidity is way too high, 50 is better. You use laser termometer to check top leaves temps
 
etruthfx

etruthfx

Well-Known Member
CalMag deficiency will develop if you have high humudity or not enough airflow, even if you are giving them enough calmag
 
polishpollack

polishpollack

Well-Known Member
Your entire statement doesn't make sense. Can you explain how humidity and airflow affect calcium and magnesium? First I've heard of this.
 
etruthfx

etruthfx

Well-Known Member
polishpollack said:
Your entire statement doesn't make sense. Can you explain how humidity and airflow affect calcium and magnesium? First I've heard of this.
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It may not make since to you, because you do not understand it. Ca/Mg is reliant on transpiration and nutrient uptake. It's well known that high humidity will cause lockout.
The fact that you say it does not make sense is questionable on its own. I can provide multiple other sources if needed, but look into it yourself.
These things can trigger what appear to be Cal-Mag deficiencies – fix the problem and many deficiencies will go away…
  • PH is too high or low
  • Overwatering & underwatering
  • High humidity
  • Uneven moisture levels in the soil or growing medium
  • Too-high levels of N-P-K nutrients
Anything that negatively affects the ability of nutrients to travel through the plant can trigger Cal-Mag related deficiencies, even when the minerals are actually there near the roots.
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As the process depends on the flow of water through the plant, any factor that affects hydration levels, such as humidity and temperature, can have a significant impact on calcium levels, even if your feed blend is properly mixed.
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