In this section, you will find the growing methods in use, the growing techniques, crop protection, disease control and variety choice of tulips, hyacinths and narcissus.

back

3.4 Receipt of the bulbs Plant the narcissi bulbs as soon as they arrive. However, if storage is necessary, place the bulbs in open trays at 15-17°C (uncooled narcissi) or at 9°C (cooled narcissi) in a well-ventilated room. The required supply of fresh air per 100 litre bulbs is 6m3/h at 17°C and 0m3/h at 9°C. Do not allow the relative humidity to exceed 75% for these two storage temperatures or premature rooting may occur. Higher temperatures inhibits growth and results in shorter crops. During storage at 9°C, humidity levels can rise to 95% or more. In combination with a poor air circulation this can result in premature rooting. This problem can be avoided by increasing air circulation and if needed lowering the relative humidity. The humidity may be dropped by cooling the air to 7°C, which causes vapour to condense onto the evaporator, after which the temperature is raised to 9°C again.