Leaves Turning yellow and brown?? Why

My lower fan leaves are turning yellow and then brown spots and then turning crispy and dying. What's wrong?? I grow in fox farm and used go box nutes with distiller water. 250wat mh/ hps. Plant in 5 gal bucket

How do you post pics

click go advanced, scroll down till ya see manage attachments should be self explanatory after that

I don't see manage attachments is it different if your on a cell phone

Nvm I got it the pics may not b clear just let me know.. But the lower leaves are turning yellow n brown spots n then on the top leaves there's lil brown rust spots and the one pic is a shot from underneath the top leaves. Humidity 40 to 65 and temps 76 to 85 n bout 5 to 6 weeks into flower

Possible cal-mag I would shoot for closer to a Cal def but just a first glimpse n hard to tell by pics could also be start or P I believe or K , not exactly sure off top of head bro but look into those 3 and so what are you feeding ???

Looks a bit spider mite'ish, but wot do i kno ha.

I using general organics go box bio thrive bloom and camg+ n bio bud n bio marine. I've looked for mites with microscope n didn't find any. The guy at hydro shop says its from humidity raising n dropping its no less then 43 n no higher then 65. It was all doin good til bout a week ago

I'm going to get better pics tonight at 830 when my lights come on I just don't wana lose my plant bc everything else is looking good to me other then those spots on the leaves

And how would I go bout fixing a certain def. I'm a first timer.

I have got the same problems definitely P and or K deficiency.

Flush and then introduce your nutes again at half strength.

I think these Are the best pics I can take anyone know what I can do and if this is gona kill my plant

If you're growing in soil (or coco), then get a ph pen. Also get some 'Bloom-CalMag' and some 'BioBizz AlgAmic'. Add those to your water and then adjust your water ph to 6.5. Using this each watering will eventually sort out the issues. You can also flush the plant before starting to use the correctly ph'd feed - flush with at least 3 times the capacity of the container using ph 7 water. Collect a little of the run off, both at the start of flushing, and the end - measure the ph of these. Doing this will probably highlight something of the problem. But yeah, the cal/mag and the micro nutrients, combined with correct ph will sort it all out. Might not be the greatest grow this time, but learn and they will get better and better.

There are other cal/mag and algae/seaweed micro nutrients, which would be good too. I recommended the ones I did because I use them myself, so can vouch for them (see the grow in my sig, and my 'Sugar Punch Grow'). When I started growing I experienced things like you are, and kept addressing the symptoms and therefore kept suffering the same problems (which I needed to solve). By doing what I advise here I have cut out 95% of problems - with the 5% being easily dealt with by small adjustments.

Oh and now I can see how far into flowering you are, avoid watering too often, let those pots dry out before giving more (but still consider flushing once before switching to the 6.5 ph cal/mag and algamic solution).

K I'm going to do get that n try it. Do u know how much those two are? And I just watered my plants with nutes last night so should I let it dry out prob 3 or 4 days b4 I water again so I have time to get the calmg and algamic solution n then flush but how much water do I flush with and then let it dry out again n then do I just use the calmg n algamic only

Or as soon as its dry n time to water again should I use that calmg n algamic solution

How old are they, and how many hours of light are they getting?

Bout 5 weeks into flower n 12/12

ok. Well I don't know why the spots are appearing, What have you been doing with the plant generally? ... Bigby seemed to know what he was talking about....