1 tsp is a *lot*. When I used powdered KB I used 1.25g which is 1/4 tsp.
For example, GH Flora 3-part in bloom is 5, 7.5 and 15ml/gal. That is NPK ratio 1-1.28-1.59. Adding 1.25g KB powder is 1-2.64-2.39. That seems reasonable to me.
5g (1tsp) is 1-5.84-4.26.
That seems excessive even for a "booster." Do people usually go that high with PK?