Flowering day 17
You can fertilize every 3 days according to the schedule and they still lose color quite early. I think it may not even be due to the amount of fertilizer, but to the uptake, but the flowering will still develop more than well. But they could stay in the food a little longer.
I've noticed that I'm putting too little lime in the 11-liter end pots (handfuls), there could be a bit more in there. I put almost the same amount in the 3.5 l pots and that was optimal.
But everything is great.