Bring a large flower seed to the dwarf child in Ranch Area.
Jump down through the chimney in Ranch Area and talk to the two dwarves to activate the event. The dwarves will ask Tomba to get a flower seed. The seed is located in the same area, to the left of the tree in the Holy Tree event.
Take it to the Dwarfs, then go to the Circus Village. Talk to the person who is standing near the empty flowerbed, and she will grow it for Tomba. Bring the grown flower back to the dwarves to clear event.