Bollenteelt

Bollenteelt is the cultivation of bulbs, underground storage organs of certain perennial plants, for ornamental use and propagation. The term covers crops such as tulips, daffodils, hyacinths and lilies, grown for marketable blooms or for forcing in greenhouses.

In modern horticulture, bulb cultivation takes place in temperate regions with winter chilling requirements. The Netherlands is a leading producer, combining field-grown bulbs for outdoor sales with specialized nurseries for year-round forcing. The sector relies on careful crop scheduling, controlled environments and postharvest handling to meet seasonal demand.

Growing conditions favor well-drained soils, typically sandy loam, with a neutral to slightly acidic pH. Crop rotation and disease management are important to reduce soil-borne problems. Bulbs are planted in autumn and undergo a period of vernalization in some species before shoots appear in spring. After dormancy, bulbs are harvested in late spring or early summer, then cleaned, sorted and cured to prepare for storage or shipment.

Postharvest handling involves grading by bulb size, drying, and storing in cool, dry conditions to preserve dormancy until next planting or forcing. For forcing, bulbs are pre-treated and moved into heated houses to achieve early flowering in late winter or early spring.

Pests and diseases such as Botrytis, Fusarium and bulb rot are monitored, with integrated pest management and strict phytosanitary controls to maintain quality. The bollenteelt sector is labor-intensive and capital-intensive, with sustainability efforts focusing on water use, energy efficiency in forcing facilities and responsible waste management.