What To Feed ?

I use strait ph 6.0 water for the first week in soilless setups like that, then I use 1/4 dose nutrients for the next week and usually go to half in the 3rd week and go from there and I use Remo nutrient lineup. Awsome stuff for the entire grow and half the price of Advanced Nutrients. But you said you were going to mix in some garden soil with the coco, make sure this is not nutrient enriched soil or time releasing nutrient soil. That would mean no nutrients for the first 2 weeks at least. And if it’s time release nutrients in the garden soil then don’t use it at all. Hope this helps, Cheers💨