with the growdots it'll be trial and error... observe and adjust... if you keep using the same oil and same number of growdots, you can pre-empt any issues in the next grow. Any change to soil composition or dose of growdots will require new trial and error.
FF trio is not a complete diet. It's guaranteed to be short on caclium, for example, and i'm not a fan of the ratios.
Athena is over-priced soiless/hydro fertilzier. It's a complete diet, but you dont need a complete diet with growdots.
In either case, you will be well below instructed doses unless you completely exhaust the growdots before you finish.
I know others that have successfully used growdots and little supplementation beyond that to maintain healthy plants. Once you get that dialed in you may not need a full spectrum of fertilizer.. maybe something specific to supplement, but not a full spectrum of nutrition supplementation.
spend 1/4th or less.. buy jacks 321 over athena blended in future. but again, with growdots, probably don't need a full spectrum of nutrition.
