Paperwhites in a ceramic pot with soil:
pot with 5/6 of the potting soil. Press the bulbs, with the tips
pointing upward, firmly into the soil and cover with the remaining soil
so that the tips of the bulbs are just showing. Keep the soil moist but
do not overwater. Place the pot in a cool (5-10°C), dark and ventilated
spot. When the buds are 4 cm high (after 12 weeks) the pot can be placed
in full daylight at normal room temperature. Turn the pot occasionally
partly, as the flowers will grow towards the light.