Dinamed too late ?

Although the daytime temperatures are about 25º, the plant does not drink too much. Watering once a week approx. This week, I reduced the fertilizer by half since it seemed to me that watering once a week and always with fertilizer might saturate the plant. It seems that it has stagnated in the total height but the lateral branches continue to grow. I have suffered an aphid attack and so I sprayed with neem and potassium soap. The next day, it seems to me that the flowers are somewhat burned at their tips. I applied the potassium soap as I always do on the leaves but I think the flowers have been affected by the dissolution of the potassium soap. Of course outside of sunny hours. Only the Dinamed auto plants have been altered. On the other hand, orange dots have appeared on three sheets. I have no idea what it is. I thought it was rust, but the truth is that the humidity is always below 60% (indoor nights) and the days are sunny. In addition, every 10 days I apply horsetail solution on the leaves. The plant has a good general appearance but in my opinion, the flowers are not very good. Flower burned? UPDATE After sending my doubts to the community, it seems that the problem with the brown pistils in the buds has been the application of potassium soap on them. I hope it can be recovered. Unfortunately, in auto growing time is gold. Thanks to @Stick, @Mrs_Larimar, @Athos & @mad_scientist for your help and support. I wish you many leafy harvests.