I need help identifying a deficiency

[bbqribz570]

hey, im new to trying to identify deficiencys, i think this is possibly magnesium, but im not too sure

and this is the only one looking good, but its a conf. female

 

[HB Rob]

Tells us more about the growing environment so we can help you better.

What kind of soil? Nutrient cycle? Heat and humidity in the grow room?

As they say around here, "When in doubt, flush." Since the pictures aren't crystal clear I'd encourage you to start with a flush to rule out overabundance of any nutrients or pH issues. From there I usually start back on feeding with an evenly balanced nute (I use a 4-4-4 dry additive) and some Superthrive or whatever you have that will help cover micro-nutrient deficiencies (Cal-Mag, Catalyst, etc). After the flush slowly build back up to your usual feeding routine.

In all likelihood the above suggestion should perk them right up or, at least, rule out the majority of problems.

Best of luck. Keep us posted!

 

[bucktoothal]

Almost looks like a Phosphorus (P) deficiency during vegatative growth.
Check out this forum:
Plant Abuse Chart

Gook luck