Pineapple lilies are summer-flowering bulbs known for their showy, long-lasting inflorescences with a distinct tropical appearance. They are a recent introduction to greenhouse floriculture and, like many other bulbous specialty ornamentals, are currently underused by the industry (Carlson, 2010). A large proportion of the pineapple lily cultivars currently available were originally bred for cut flower production (J. De Goede, personal communication). Several factors that made these cultivars attractive candidates for specialty cut flower production, such as the production of large, showy inflorescences in a wide range of colors, excellent postharvest longevity, and unique appearance are also desirable for potted plant production. Although interest in the crop has increased in recent years, many commercial greenhouse growers are hesitant to produce them because of a lack of production information and other grower resources (Carlson, 2010).
In many geophytes, bulb size plays a major role in determining competency to flower and may affect factors related to crop quality, such as inflorescence size and number of flowers produced per plant (De Hertogh and Le Nard, 1993), but the optimum bulb size for these cultivars has not been determined. The objective of this research was to determine the optimal bulb size for four pineapple lily cultivars [originally bred in New Zealand and derived from tall pineapple lily (Eucomis comosa)] when grown as a potted plants.
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