Tulips are spring-flowering bulbs, which must be planted before (severe) frost in the autumn from September to December.
Dig a hole or trench about two times the height of the bulb. Plant the bulbs 12 to 15 cm apart with the tip upwards in well-worked soil. Place the bulb or several bulbs in the hole/trench and close the hole again with soil. Water the bulbs after planting, so that the soil is moist to encourage root formation.
After the tulip bulbs have had a cold winter period, you can finally enjoy your beautiful tulips in the spring.