Whats Wrong With My Plant???!!!

i noticed a black spot on my seedling Yesterday and now it has spread and covered many of the other leaves. i looked it up and it kinda looks like its phosphorus deficient but idk. can any one tell me what it is and how to keep it from getting worse.. this is my first plant..:wall: pLZ look at them help me figure this out out fellow pot lovers.. :sad:[I
 

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if ur leaves start to curl or get crispy.. r u feeding it anything?? usually when u are over feeding the tips will yellow and burn first
 
if i were u i wouldnt feed it til its atleast 3 weeks old. its to early right now. the roots r still trying to develop so u dont want to burn them in this stage of u will stress ur baby out..
 
That looks old enough to feed. How old is it?

It looks like you have the lights too close, and your soil may not have any food in it. Seeds have enough food to make it a few weeks, but then need nitrogen to keep going. Plus, those seeds look a little mutant, are they bag seed?
 
Oh this is a clone? Or you mean a seed you got in a bag?

Either way 3 weeks is about time to start feeding. Watch that light, it's still a baby. Don't fry it. It should start to develop real leaves soon, if not I would be a little concerned.
 
dude that halogen light doesn't cut it to grow.

nobody else cares to say it so there.

halogen lights emit a lot of green light, which is unusable for a plant.

you're using 500 watts of power and the plant is only getting about 30-40 watts worth of usable light.

if that... it's probably closer to zero usable light...
 
Wow, yeah I missed that. If you can afford a 250 watt switchable system, that would be best. If not, look up CFL grows, those guys give really good descriptions of their setups, parts list, etc.
 
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