Dry leaves and brown spots ?

Hey guys n gals, im on my second grow, i started 2 more of this strain. They went into flower on 0ct 6 and already they are showing some yellowing and brown spots. This happened before, but it only affected the one strain, the others were fine. But the last time it happened it was later in the cycle. So can anyone shed some light on why this is happening? My guess is some kind of nutrient problem, because the plants just finshed there growth spurt, and the first buds are showing.
Thanks

pics??????????????

That's improper fertilization - either too much or too little or a really bad imbalance.

i bet more people will be willing to give you some advice if you posted a pic
its really hard to tell you whats wrong with a description
brown spots can be anything from necrosis to a k def over fert or even a iron def. try to get a pic

Here is a couple pics, but my cam kinda sucks. Its starting to spread to other leaves , so anyhelp would be appreciated. I have only fed her very dilluted Dutch Nutrient Formula, Grow. I have not got the bloom nutes yet.

wow those plants do not look good.. you have a lot of problems here....
um does not look like there getting enough light the way there stretched like that
and is that how the grew or did you trim the shit outta them?..
are any of you small leaves curling under?
i wanna say it might be over fert but its hard to tell in these pics.
try to get a close up of the leaves. take three. one of the healthy big leave one of the shitty leaves and one of the newest growth leaves
and what kind of soil r u using? is it time released?

Its not a light issue, its just the strain the last ones I grew were too far under the light. This time its right under and like 1 inch below the cool tube. Its not hot I can hold my hand to it. So I dont think thats the problem. I have only took about 2 leafs off her that were really bad. The leafs grew like that after I toped it. Thats why there is two mains. I am using Sunshine Mix #4 , no time release. I think you think its worse than it is because of the angle of the pic, I will try and get a better pic. Its weird tho its only the one plant, al the rest are fine. It only the CherryBomb/Lionheart clones that do it ? Weird. But thanks alot for the help. Im still pretty "Green" . Like I said its only the start of my second grow. Im still waiting to chop the first round down. One more week. Cant wait.

nute burn i suspect by the looks of it
calcium deficiency less likely but common in 1st few weeks of flower and can cause brown spots, maybe both

Get a magnyifing glass and look for thrips