I may not be correct on all but I will say that I will get a huge algae bloom on tanks that aren't particularly balanced to begin with. That leads me to believe that the plants are not taking up much of anything for a short period of time.
So is it the nutrients or is it the something else that's not balanced?
I trim with extreme prejudice.
I also dose the same either way.
Never seen any thing I could say is dependent on nutrients.
Hoppy's comments about light, as a stem grows taller and gets closer to the light= this will increase CO2 demand and then nutrient demand.
At least till it hits the surface and then the CO2 demand is easily met.
Older leaves do not have much nutrient demand vs new leaves.
But after a big hack, the nutrient demand is much lower, so dosing less will be okay also, but dosing the same will/should pose no issues.
If so, then something other than the ferts is the real problem.