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.

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2.3 Planting time When to plant hyacinth bulbs depends on several factors: - Their preparation. The best time to box-up prepared bulbs is during the second half of September. Unprepared bulbs are planted from October. - Storage during the cold period. If the bulbs are stored in a rooting room which is not air-conditioned or in an outdoor storage clamp, they cannot be planted until the ambient temperature has fallen to 13ºC or lower (optimal temperature: 9ºC). Higher temperatures cause poor rooting, an increased risk of Fusarium attack, and a slow down in growth. Storing bulbs at 13ºC for a few weeks immediately before planting is acceptable. - Required flowering period. By counting back the number of weeks from the required flowering period, the right planting date can be calculated. - The required cold period per cultivar and time of year. - Cultivar. Not every cultivar is suitable for every planting period. In addition to the duration of the flower development period and the length of the cold period, other factors include problems with plants becoming too tall and too limp in the greenhouse.