you always refer to tomatoe or pepper instruction...or fruiting flowering plants...O fcourse some manufacturers...list formulas like...germination...seedlings...veg...medium sized plant...mature, flowering...trees...etc In these cases use the recommended dose for the appropriate time of the grow cycle.

I never nute...until the plant has 4-5 trues sets of fan leaves...It doesn't need nutes any sooner. Then I go 1/2 formula for 1 week, then full tilt boogie...If you have the proper meters and stay up on your grow, you can use nutrients at full strength week 3 or so...peace hope this helps.

p.s. I moved this thread to basic growing where it belongs...The lounge is for relaxing with somewhat off=topics...not growing advice...peace