Grow Mediums Need help first time coco grower

[Sm0key.Gr0wz]

Hello this my first time growing coco I'm a soil user but I been studying cocoforcannabis for awhile .So it's been 2 weeks my buds has not increased in size plant Is drinking very slowly now that's in flower.Everything was goin good til preflowering time. I started 3g and added epsom salt.Day 25 i seen a slight nute burn but I didn't back off the feed because it was still stretching and I defoliated few older leaves.A week later I have increased to 4g but the buds has not increased in size then I increased to 5g still no change Yesterday I got a ec meter I checked runoff ec was showing upper 2400-2500 so I flushed with 3g megacrop 500ppm + my tap 200 ppm + epsom .5g(56ppms) (ec1500-1600) to see if it's goin recover.This morning I fed again same nutes and ec is the same likes it's not eating. Im not sure what's the promblem check the pics below


Sour stomper Day 44
Coco 70/30
Nutes :megacrop one part epsom salt
Pot 1 gallon
Feeding twice every 12 hrs during flowering
Temps 75-80f
Humidity 40-60
Lights :viparsprectra xs1500 150w Samsung led



Pics from few weeks

 

[2budz]

That plant looks great. I wouldn’t sweat it to much. Don’t get crazy trying to correct it you may really mess it up. I’d keep feeding and doing what you’ve been doing. I grew a sour stomper and the buds didn’t get very big but from the look of things you’re still pretty early in flower anyway.

 

[DCLXVI]

pH is very important in coco. What have you been adjusting your feeds to?