is this a mag deficiency?

O

oldskoolnewskool

Active Member
Can anyone tell me what I've got going on with these young ones?
 

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It looks like it, however the upper leaves appear OK....Did you add CalMag? Those lower damaged leaves won't correct themselves, so you may as well trim them off...Makes it easier to spot new damage too.
 
With the age of your plant, it's likely not this damaged from deficiency.

What soil is your plant in, what nutrients have you used, what type of light do you have and at what distance?
 
manfredo said:
It looks like it, however the upper leaves appear OK....Did you add CalMag? Those lower damaged leaves won't correct themselves, so you may as well trim them off...Makes it easier to spot new damage too.
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I wouldn't remove the dying leaves just yet. When I have an issue with a plant, I leave the unhealthy leaves as a baseline to monitor whether the problem has stopped progressing or not. I'll remove them after I've rectified the situation. Also, magnesium deficiency usually shows yellowing of the leaves before they go necrotic.

For the OP... what's the pH of the water and water/nutrient mix you've been feeding, and in what medium?
 
organic potting soil with extra vermiculite mixed in, county water with cal mag 1tsp per gallon and 1.5 tbsp of grow 3-2-4 per gallon,,, wetted soil shows 6.5ph, have a water tester on the way to me, LEDs at 18",,, 6 week old auto flower plants under same conditions/nutes are growing like crazy and arent showing this yet
 
Are they from seed or clone? they are small to have that bad of a deficiency im thinking if they was clones maybe the mom was unhealthy. it does look like a mag deficiency to me but Ive never dealt with it outside of flower......i agree with spek9 leave the leaves for a base line...goodluck
 
SHYNGROWLAbs said:
Are they from seed or clone? they are small to have that bad of a deficiency im thinking if they was clones maybe the mom was unhealthy. it does look like a mag deficiency to me but Ive never dealt with it outside of flower......i agree with spek9 leave the leaves for a base line...goodluck
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one is a reseed, one is a seed bank granddaddy purple
 
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