Help needed please

[BillNBen]

Hello i am on my second run in my room and every thing is the same as first but having problems that’s I can’t seem to figure out ..
my temps are 28.c day - 22.c night
Lights on 18-6 as in veg
Humidity is 60%
I run calmag with my nutrition and also added raw nitrogen still didn’t make a difference.
They are currently around day 40 from clone I added a couple of extra clones 15 days ago for security and they are nearly bigger, wider and definitely more happier already
See pics

 

[BeanTownFan420]

Flush your medium with plenty of clean water then wait a few days and feed.N P K nutrients for veg.

 

[BillNBen]

Why’s are the older plants like this thou when I am using some nutrients on both plants ?