what is this nute deff?

my grow mix 33 %coco, 33 soil, and 33 peat moss, ph is around 5.5, plants are 4 weeks old

well first off ur ph is to low..what are u feeding them?

I run 5.5 in my hydro but like 6.4-6.8 in my soil grows.

okay i will try adjusting the Ph thanks