Smallest plant is using up its first little leaves

[AKroughneck]

This is the smallest of the 5 I have in my outdoor greenhouse grow, it's a quarter pounder auto, in pure perlite, all others are in a 66.6/33.3 coco perlite mix, they are all fed the same 1ml of each flora nova grow calmag plus rapid start per gallon, ph 5.7-5.8 watered until run off has been twice a day now this youngest plant must be about 2 weeks old now and has been outside about a week now, I'm just wondering if it's using them up because something is wrong, all the other plants still have healthy baby leaves
Journal @ THC Bomb Auto - Berry Bomb Auto - Quarter Pounder Auto


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[Greenethumb42]

I'm pretty sure it's normal mine are doing the same thing but I may be wrong..lol

 

[Lilred]

Normal

 

[EARTHWALKER]

Out of the last 8 grows I've done (18 plants) only 1 has ever kept it's shell leaves until the plants reached their 3rd nodes.
I'd say on average it's odd if they are not like yours