Is this a calcium deficiency?

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Medium is pro mix soil with 10% coco
9week from seed
Purpule kush auto
Under Cree cob 250w
Nutrients from advanced nutrients
cal mag / micro /grow / bloom / big bud
4/3/2/3/3 ml/L
Ph 6-6.5 700ppm
 
Medium is pro mix soil with 10% coco
9week from seed
Purpule kush auto
Under Cree cob 250w
Nutrients from advanced nutrients
cal mag / micro /grow / bloom / big bud
4/3/2/3/3 ml/L
Ph 6-6.5 700ppm
LOL. Happens. Probably hit post reply b4 photos loaded. I've done it.
 
sorry guys... Something went wrong with photos :doh:
IMG_20200410_124911[1].jpgIMG_20200410_125018[1].jpg
 
Given the age of your plants.
I'd start by watering to run off. And take a ph sample.
Promix becomes a bitch with time.More so with ph and lock out than with nutes.
Are the lower leaves starting to rust?
Don't fall into the trap of adding more calmag.
It could make it worst.
Flush with RO for your ph run off reading.
This approach is a guesstimate. And not an exact science by any means.
Only a soil PH pen can tell us the true story at the roots.
After your flush, feed with regular dose of nutes.
I suspect you're not watering to run off and accumulating salts causing a ph imbalance.
 
Last edited:
Thanks for answer!!
Yes you are right. I'm not watering till runoff :/
So I will try to flush them and give normal feed after they dry.
Lower leaves, old leaves turned greenish yellow ( but this happened a while ago)
 
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