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After storage at different temperatures for a simulated transportation period, the vase lives at 20 °C (68 °F) of carnations (Dianthus caryophyllus ‘Imperial White’), daffodils (Narcissus pseudonarcissus ‘King Alfred’), iris (Iris hollandica ‘Telstar’), killian daisies (Chrysanthemum maximum), paperwhite narcissus (Narcissus tazetta ‘Paperwhite’), roses (Rosa {XtimesX}hybrida ‘Ambiance’), and tulips (Tulipa gesneriana) decreased with increasing storage temperature. There were no significant differences between the vase life of flowers stored dry and flowers stored in water when storage temperatures were from 0 to 10 °C (32 to 50 °F). The vase life after wet storage at temperatures of 12.5 °C (54.5 °F) and greater was significantly higher than vase life after dry storage at those temperatures for all the flowers studied. Iris and carnation flowers survived storage at 15 and 20 °C (59 and 68 °F) only when stored in water. M onitoring of transit temperatures of commercial cut flowers has shown that flowers are often exposed to damaging high temperatures. Maxie et al. (1974) and Thompson and Reid (1994) recorded flower temperatures above 27 °C (81 °F) in commercial flower shipments. Poor temperature management during transport of cut flowers is largely the result of inadequate precooling and transport under nonrefrigerated conditions. Several researchers have shown the negative effects of improper storage temperatures on vase life of a range of cut flowers (Cevallos and Reid, 2001). The poor arrival quality of transported cut flowers has spurred the development of systems like the Procona buckets (Pagter Innovations, Dinteloord, The Netherlands) in which the flowers are transported in water. Industry leaders have claimed a considerable improvement in postharvest quality for flowers transported in this way, and these claims have reduced the industry’s emphasis on proper postharvest temperature management. Warm storage temperatures accelerate water loss, so it is possible that wet storage helps by replacing lost water. However, we have shown that reduction of cut flower vase life during storage is highly correlated with respiration at the storage temperature (Cevallos and Reid, 1999). A substantial reduction in the vase life of flowers shipped at warmer temperatures would therefore be expected even if they were shipped in water. In the study reported here, several cut flower species were used to test the hypothesis that wet storage would have a beneficial effect on vase life only when flowers were held at warmer temperatures.

Effect of Dry and Wet Storage at Different Temperatures on the Vase Life of Cut Flowers