First coco grow. Do i need to supplement calmag with canna a+b?

[olschool]

i use coco 70/30 and gia green 4-4-4 2-8-4 50/0 mix 3 tbs per gallon plus worm castings after they get going i foliar spay 2-3 times a day with ph 5.8-6.2 calmag solution no ther amendments or nutes this pic is 2 weeks until flip the tall ones on the end are like 3 weeks ahead of the middle ones