Buy a complete nutrient made for hydro (and cannabis) and wait until the plant is at least 3 weeks old before giving it any..and then only give it 1/4 strength and work your way up.
Mixing stuff together will be confusing and you'll never know what yer plants are really getting. Blood meal is strong stuff..and I know many folks have burned their plants using it.
light is more important that nutes... slam em hard with light and go easy on the nutes...