Outdoor grow looking like bonsais

Armz05

New Member
I’m growing a few plants outdoors but for some reason they aren’t growing very large. They almost seem a bit stunted and I’m not too sure why. Is there anyway to help them grow a bit bigger? I’ve grown outdoors many times and they should usually be at least double this size by now (week 5) of veg.
photo below to show size.
 

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