This woman, at the bottom entrance is a crook who is forcing people to but tickets to both the palace and the garden (upstairs this is not the case). She is rude and would not identify herself.
Definitely worth seeing. Staff is sort of difficult to talk to. Entrance fee is some 12 lv which I find particularly expensive for Bulgarian standards.
Очаровательный ботанический сад: можно спрятаться от жары и продегустировать бесплатно вино. В сам замок лучше не ходить, внутри пусто. Можно купить билет ТОЛЬКО в сад, хотя зазывалы говорят что нет.