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Hey guys, hoping you can help me out with a little deficiency i noticed this morning...
Dag 67 (5).jpg Dag 67 (4).jpg Dag 67 (2).jpg Dag 67 (1).jpg Dag 67 (6).jpg
The black spots on newer growth is only on 1 branch, but it kinda looks like this https://www.growweedeasy.com/calcium-deficiency-cannabis
Ca def?
Also had purple stems/petioles for quite a while, but that has not seemed to be a problem growth wise. Figured it was just related to the strain or the colder nights.

Info:
Day 66 veg.
260w XW QB LED 22" above at 60-75% power.
16-22c night, 20-25c day
50-60% RH
Watering PH 6.4-6.8
Started in Plagron Batmix (6 weeks of ferts) and transplanted into 20L Airpot with lightmix at around day 40.
Been feeding her 2.5-3.5ml/l biobizz grow every 2-3 days and 1/5th ts/l epsom with 1 ml/l Alg-A-Mic foliar once a week.
Foliar feed is due tonight, and this problem just showed up this morning.
Also noticed some leaves doing the taco...
Leaves are plump with water so i might have given her a little too much with the last waterings.

Any input is appreciated! This girl will be put into flower within the next week most likely.

Edit: The attached file of an older leaf is probably just me spilling nutes when i think about it. Probably just gotten worse as the leaf grew.
 

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