Need a little help to identify

Hey so I have a grow log set up and its a pretty basic grow outdoors. You can check it out if you need to or ask me.
They have started flower and have had some pretty good growth. I just saw white pistils the last couple of days.
I first noticed on 1-2 plants a little yellowing on the lower leaves.... I wasn't too concerned as it was time to give them a big feeding. I fed them yesterday and I know it takes 2-3 days in soil to see a difference but I wanted to make sure that you guys/gals agree, theres a few spots and its the only thing thats got me a little nervous.

Could be some nutrient burn? dunno, they are foliar fed as well once a week very early, 6-7am.

These pics are from same plant and all fan leaves, most yellow at the bottom of the plant greener at the top.

Is it just N defficiency and should clear up once the nutes take hold or is it something else or a combo?

pics are a bit dark but the yellowing on the very bottoms are usually normal but the spots look like a pest of some sort

VinnyOcean said:

pics are a bit dark but the yellowing on the very bottoms are usually normal but the spots look like a pest of some sort

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Hmm pests, yeah could be its an open air grow and Ive had battles with leaf hoppers and leaf miners.

Sorry about the dark pics, I took them as the sun was almost gone.

Nugs1 said:

Hmm pests, yeah could be its an open air grow and Ive had battles with leaf hoppers and leaf miners.

Sorry about the dark pics, I took them as the sun was almost gone.

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no worries just wont know forsure without a better look but heres a reference to common issues
http://www.growweedeasy.com/marijuana-symptoms-pictures

VinnyOcean said:

no worries just wont know forsure without a better look but heres a reference to common issues
http://www.growweedeasy.com/marijuana-symptoms-pictures

Click to expand...

Don't know why I didn't go there first, I have it saved in my bookmarks.... Anyway so far Ive realized there may be a cal mag deficiency.

I can say with some certainty that its a cal mag deficiency. Looking back at feeding notes I have realized that I have been feeding way to little cal mag, mostly because I feed with rain water which lacks any cal mag and I have been giving way to little cal mag in my feed schedule.

Thanks Vinny