looking for some advice for jack herer issue

hi guys
now i have x4 jack herer plants currently at 3rd week of flower 2 of them are dense already top to bottom with bud but the other 2 grew twice as high and only have small buds with a big gap between them will these grow and join up or do I have 2 popcorn plants

Jack Herrer will give lots of varied plants because of the way it was made,the J.H that won the Cannabis Cup isn't the J.H that Sensi put out.

It's the difference between individual plants (regardless of strain)...it's referred to as 'phenotype'...don't sweat it. It's the reason some siblings are taller than others, or better looking, even though they come from the same parents. Your grow looks nice!