EFFECT OF TEMPERATURE AND DAYLENGTH ON FLOWERING OF EARLY FLOWERING GLADIOLUS

Early flowering gladiolus initiates flower buds when the first leaf has expanded after planting.
In ‘Bride’, ‘Robinetta’, ‘Impressive’, ‘Charming Beauty’ and ‘Elvira’ flowering was accelerated and number of leaves at flowering was decreased by exposing corms to chilling at 6-10°C for 6 weeks under dry or wet conditions.
In ‘Elvira’ and ‘Charming Beauty’ days to flowering after planting was decreased by chilling corms before planting, but actual flowering date was advanced by planting corms earlier without chilling.
Long day treatment by extending natural daylight to 16 hours accelerated flowering in ‘Bride’, ‘Robinetta’ and ‘Impressive’, especially when applied to chilled corms of ‘Bride’ and ‘Robinetta’. However, the promotive effect was not observed in ‘Elvira’, ‘Charming Beauty’ and ‘Comet’. Early flowering gladiolus cultivars with different pedigrees were classified into 3 groups by their response to temperature and daylength.

VIII International Symposium on Flowerbulbs

H. Imanishi, Y. Imae, E. Kaneko, S. Sonoda

Chilling, cultivars with different pedigrees, daylength, early (spring) flowering gladiolus, flowering

https://doi.org/10.17660/ActaHortic.2002.570.63