Yellowing and Spotting....Please Help!

First off...this is my first grow.

I started noticing a few of the lower leaves were turning yellow and dying. I plucked them and figured everything was alright considering how good the rest of the plant looked. Well...it hasn't stopped. My next guess was some kind of nutrient deficiency so I upped the MiracleGrow but its still doing it. I'm also seeing some nute burn now. (Whoops) The first 3 pics show what she looks like right now and the 4th is from a couple weeks ago.

There is still new growth and the top seems quite healthy. Any ideas on whats happening here?

Oh yeah...and I have another plant (same strain, nutes, lighting, etc.) that is doing the same thing....so this sucks twice as much. I wanted to start budding them soon but this is making me a bit apprehensive.

Please help.

2 things i see,,, nute burn and it needs some magnesium. flush that puppy and when you feed it again add alil epsome salt. and by alil i mean a very little.

Like I said...this is my first grow.

So to flush them I give them plain water? Do I give them an excessive amount all at once? Or just give them plain water on a normal schedule for a certain amount of time?

Thanks for the fast reply.

yup just flush them,,, give them about 2 times as much water as you normally do all at once. your trying to wash the nutes out of the dirt,,, thats what flushing means. let the soil dry alil (a day or 2) then add some nutes with the epsome salt.

Awesome. Thanks a bunch for the help!

n/p hope it all works out for ya

Hi,
Plants are probably close to being ready to harvest with the weather staying warm.. Plants are outdoors..
I have notice a lot of yellow leaves on the plants, is it overwatering, or ? which we have been doing almost daily, from our well,( because the east coast has been in a drought..

The seeds were bag seeds that was kind of thrown in some pots, and grew, So they have been transplanted and doing pretty good, I have grown years ago, but never got them to the bud stages..
I have four plants growing, and was able to remove the one male, before flowering..
We had used Miracle grow, slow release fertilizer ( it is what I had) and they are planted in Organic soil.. in pots, with some mulch on top.

Also, when do I Know when it is time to harvest