Why is greenhouse seeds so crap

i have 1 slh from seed in 3rd week of flowering right now and i was thinking it was doing very well. id say its growing alot nicer then my kush beans. i was really excited, i hope it doesnt turn to shit. i mean the plant grew and topped just perfectly. the internodes are spaced nicely and i was able to keep the height controlled. well ill know in a couple months... wish me luck guys.
 
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