Happy frog only has a 5-7-3 NPK ratio. Kind of weak in the P and K for my liking. Maybe this is why people bottle feed to make up for what the soil lacks during flower. Flushing would seem like a bad idea because you’re just washing all the nutrients out of the soil. Top dressing would be the easiest way to add back in what you washed out to replenish the food. She might be hungry for Potassium and Phosphorus.