Can someone help me diagnose this?

[bubblegumbum]

Ok, so I gave all my plants some Epsom Salt, 1 tsp per gal, because I thought that one of my plants is possibly showing signs of Magnesium defiency, I think. Im new to diagnosing these kinds of problems so I will post a few pics and any feedback Id appreciate it.

Two pictures show the lower leaves of one plant that are turning yellow.
The middle one is from a different plant, with a different symptom, the leaf is curled, and the yellow is not spread on this plant and is more spotty.

[Ganja Guerrilla]

You need a good dose of ferts well rounded NPK values 10.10.10

if you have done this within the past 4-5 days we need more info as to the cause of nute lockout .........soil, lites, PH runoff, ferts etc etc

[GrowBot]

looks like zinc but prob. a lockout. if you're using a quality fert. then so flush with ph'd water.

[bubblegumbum]

Right now I am using the General Hydroponic brand fertizilers, is that a bad idea with soil? The soil I am using is just Sta-Green potting mix and vermiculite mix. Usually the nute water is slightly acidic, probably 6 (after adding Ph Up because the nutes are acidic). The only fert these plants had was probably 2 weeks ago and I put them into flowering this past sunday. Since i thought it was Mg defiencient, I gave it some Epsom salt solution tuesday. So, should I buy a 10-10-10 or give it the GH MaxiGrow(10-5-14) or GH maxibloom(5-15-14)? Or should I flush it? Im not too sure of the soil Ph because I dont have a tester.
Thanks.

Also, they were under 400 watt MH until sunday, now under 400 hps.

[Ganja Guerrilla]

give it dose of maxi bloom, remove the necrotic leaves so that you can tell if the problem is advancing or halted.
you would do well to foliar feed this plant aswell to get the ball rolling use the same ferts @ 50% strength
you should see signs of improvement with 12- 36 hrs

you need a ph kit to test the water runnoff after you water the plant, if this dose of ferts doesnt fix the issue its prolly PH lockout and needs a flushing, then add ferts @ 50% to ease them in

ps
I dont like the soil, isnt so green is it?
tell me did the soil say ferts added, or have an NPK value on the bag?....the name "stay-Green" sends red flags up

can we get one pic of a whole plant

[bubblegumbum]

Thanks for your help Ganja Guerilla. Here are full pics of the two females.
Yea, the soil brand name sta-green is kinda like miracle grow. Unfortunately, I didn't know my city had a hydroponic garden center that sold good quality organics soils, but you learn from your mistakes. For my next crop, def. gonna go with the organic. The levels of NPK in sta-green is real low, it is .14-.11-.08. Also, on the GH maxibloom has doses for foliar feed, cuttings and seedlings at 1/4tsp, slow growing plants at 1/2tsp, For most applications 1tsp, and 1 1/4 tsp for fast growing and 1 1/2 tsp for very fast growing plants. Where does cannabis fall? And so, half of this amount I should use to foliar spray it as well or the lowest dose?

Also, the photo of the top shows a blade of leaf that is turning yellow, and this is the first sign of that on the tops, figure it might be of importance.
Peace

[Ganja Guerrilla]

as to the foliar solution always go easy and work up in strength... try 1/2 teaspoon, spray both sides of the leaves

systemic feed with your maxi bloom 1/2 strength 1st time as not to shock, then regular feedings full strength every third watering

Id like to see that transplanted into a 5 gal bucket & using better soil aswell, your soil will work with a plant this age IF nothing better is available, these girls are voracious eaters & there isnt enough in that soil to make em "Stay Green"

you'll be fine