name this deficiency

need some help here , thinking its calmag but could be wrong.. grown in hydro ph is 6.0 using LEDs and RO water started on the lower leafs and working upwards , thinking adding more calmag would help or slow it down ...

bubba73 said:

need some help here , thinking its calmag but could be wrong.. grown in hydro ph is 6.0 using LEDs and RO water started on the lower leafs and working upwards , thinking adding more calmag would help or slow it down ... View attachment 4065485 View attachment 4065486 View attachment 4065485 View attachment 4065485 View attachment 4065486 View attachment 4065487 View attachment 4065487 View attachment 4065485 View attachment 4065486 View attachment 4065487

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yup looks like rust to me,go easy damage is done cant change that

Notice how the problem starts from the bottom leaves up. That right there is a clue. I doubt its fungi, but if it is, you need to check how well your grow room is ventilated as fungi thrive on stagnant air. I suspect it's a nutrient deficiency/nutrient lockout problem. Your 6.0 PH is good, so it's not necessarily a nutrient lockout due to bad PH levels.

Check these sites that identify leaf problems.
http://www.ilovegrowingmarijuana.com/guides/marijuana-plant-care/marijuana-nutrients/
http://www.weedfarmer.com/cannabis/tables_guide.php

huh rust as in lacking cal sorry lol

thanks !!!