The problem turned out to be the following, a large amount of fertilizers in the recommendations from the Planters 700 ppm
I washed 400 PPM with compote at the outlet from the drainage, we have 450 PPM. A day has passed after washing, the flowers begin to recover after an overdose.
The conclusion is the following for the first weeks of growth in salt content, fertilizers in the solution, 400 PPM should not be added