Need some help guys!!!! (Pic to View)

Just switched to flower about a week ago and all has been well till yesterday I noticed some really small brown spots on some of my upper fan leaves! Also the veins on the leaves are beginning to turn reddish brown as well. Any help would be much appreciated. I'm pretty sure its a deficiency of some sort but I've been reading and reading and I realliy can't get a difinitive answer for this one I just don't want to make the wrong move!

look at the undersides of the leaves and take a picture

Usually in my 3rd week of flower i sometimes start seeing signs of a Nitrogen def. Escpecially in my taller plants. You have any more pics? Feeding schedule? Nutes?

heres a pic of the underside. I'm feeding once weekly just under the reccomended dose with a watering in between. Using Botanicare. I have all their extras except Hydroplex

They look under nourished. If it was later in the grow I wouldn't worry - but you have a long way to go.

Should I be feeding twice weekly then until I start seeing results?

It's definitely not a burn so that would lead one to think it's hungry. Are you adding any cal mag? Nitrogen doesn't usually show up as rust spots either. It's more of a yellowing of the leaves kinda thing

I just started using cal mag last week and this showed up afterward! I foiliar fed and water fed with botanicare pro bloom soil this morning so I'm hoping I see some changes in the next couple days. I'm thinking its just an all around definciancy caujse I started late with the fert due to financial shit. Ill def be askin some more questions if this doesn't get any better by the weekend!

Are you soil? Soilless? More details the better....how often do you water? How good is your drainage...ect

For sure, give it a little more food and hit us with some pics in about a week. We'll see what we've got!

Yea def underfed guys they look so much freakin better now!!! I got a good schedule now for this line its my first time using it. Thanks for the help!!!

Looks like you found your answer.

Here's a few pics of where I'm at wit these blue haze. Looking much better!!! Week 6 Flower

That big bitch on the right is a mother thats only in week 2. Needed some space so I had to let her go.

cal mag me thinks.