Yellow/Browning Going up the plant

[colorlessworld]

This is my first grow and out of nowhere the bottom of my plants leaves are turing yellow to brown from the tip and working its way back and its slowly working its way up the plant., Ive read it was a N diffenency and others say its a over nute even tho I just added Nutes for my first time today, any ideas?

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[seldomBLUE]

You have an Mg deficiency, the cause of most brown-spot issues. Take the same advice i gave here;

http://boards.cannabis.com/plant-problems/201232-please-help-plants-dying.html

In addition i would flush with a 150-200ppm Cal-Mag solution to combat the deficiency. Check the ppm of your runoff after 1/2gal of the solution. You'll probablly be in the high range and should be around 450-600ppm. It took some years to figure out but i've found that the starter ferts in potting soils/mixes were at high levels (ppm) and caused most of my problems. 1/4 - 1/3 recommended strength should be applied to the soil as well. Pre-flush your soil with 120ppm Cal-Mag to get it down to 400-600ppm. Water with 100ppm Cal-Mag solution (calibrated from zero). Knowing the starting ppm level of your mix takes the guess work out of how much to feed. You just increase the ppm as the plant requries.

Just my experiences. Hope it helps

[colorlessworld]

Okay Ill look into it, I added some Miracle Grow All Purpose Plant Food to my water this morning and Nitrogen had 12%, Phosphate was 4%, Potash was 8%, Iron was.10%, Manganese was .05% and zinc at .05%

What would you recommend for the Cal-Mag solution? and Im a noob at growing so could you explain ppm?