Can someone help me??? Pics inside

Can anyone tell me why 4 out of 6 arent growing taller??? I got these clones about a month ago and only 2 seem to be getting taller. I leave them outdoors. Im using gardeners gold potting soil which I heard was just as good as Black gold.... I dont use nutes.... They are supposedly Granddaddy purple strains...Please help me, Thank you all
 

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