Lots more info needed. That kind of spotting and necrosis in such a young plant is a big red flag.
I think it has to be related to your soil and/or pH levels, so there may or may not be an easy fix.
What soil are you using, what kind of water, and what pH is your water and soil?
Gotta be a big imbalance going on somewhere, Wag.
You know what I think your right..I think this is one of those beginers lessons ..I don't really have the tools required to maintain perfection. .I just harvest my first grow with absolutely no issues..I know different strains are individual when it comes to how they grow...iv got 3 nyc sour diesel ..2 are sick looking ..think I mite fuck em out..goin to my grow shop thursday..gona make an investment and start again..gona get some decent soil,cal mag ,ph down. (My water has high ph)and maybe so root booster)and a hygrometer...I guess il call this lesson learned. .thanks for all the help and advice...
... consider using inoculants too to keep them at effective levels....

... what strain are these? I dig their structure too!