Very light to start - and build up slowly Give the most in the first week of bloom and then decrease do a PK boost the last couple of weeks of bloom and then a pure water flush the last week - always comes out good
I hrow using Black Magic soil aswell. The soil itself is good for 1 month of veg. The soil already contains plenty of nutrients. I start my plants with 1/2 TSP of Fox Farm Grow big while in veg. But use half strength to start. Black Magic is a great soil.