Problems on my first grow

[Blickmorant]

I'm having some type of deficiency with the Browning of the leafs now. The purple stem could just be genetics. Because that's only on one of my plants. I have 4 plants and all of them have that same Browning pattern. Can anyone please tell me why ? This is my first grow And I'm not sure what's going on. I use half Happy frog and half. Ocean forest on the bottom temperature is usually around 70 Humidity is usually about 60 to 65 . I water when the soil becomes dry. And PH Is usually around 6.4 . I'm not posting this for you guys to bash me but to help me . So far, first grow is going good. I'm about forty five days in

 

[Choppr]

Not every leaf will look perfect during a grow... It could be anything really? Symptomatically Rust spots are usually Calcium Issue(but, too much/too little will often give the same leaf signal)... if its a lower leaf it could've been something that happened weeks ago? and chasing something that happened weeks ago is chasing your tail. Always look at new growth, if new growth is healthy and the node or 2 down from the new growth, your OK, if it becomes wide-spread you have a problem, I would be more suspect low calcium just because its pre-charged soil, and your plants look about 6 weeks old. - You should add Cal/Mag every other watering, especially going into flower (soon). You will eventually move away from "pre-charged box store soils", because you will never have control over your process, You never really know what's going on in the soil media. Experienced growers will never sweat a leaf or 2, especially lower on the canopy, get some cal/mag, monitor your Plants daily. that soil will run out of nutrients soon.? what is your nutrient plan? Overall your plants look in good health, Good 1st grow so far! Right On!