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Allan M. Armitage and Ki-Cheol Son

Plants of blue spirea (Caryopteris incana Mig.) were evaluated as cut flowers in the field and greenhouse. When subjected to several photoperiods but similar cumulative quanta, plants flowered more rapidly at 8 hours than at 12 hours and did not reach the macrobud stage at 16 hours. Stems were longer and their count was significantly higher with a 16-hour than an 8-hour photoperiod. In the field, yield and stem diameter were similar in full sun and in 55% shade. Stem length, however, significantly increased under shade.

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Gabriele Amoroso, Piero Frangi, Riccardo Piatti, Alessio Fini, Francesco Ferrini, and Marco Faoro

least ( Table 3 ). Blue-spirea, border forsythia, bumald spirea, fuzzy deutzia, glossy abelia, goldencup st. johnswort, hybrid deutzia, redosier dogwood, scorpion senna, spanish broom, virginal mock orange, and purpleosier willow had the lowest hand

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Tongyin Li, Guihong Bi, Judson LeCompte, T. Casey Barickman, and Bill B. Evans

), or green bunching onion ( Allium fistulosum ) ( Wolff and Coltman, 1990 ). Furthermore, Armitage and Son (1992) indicated no difference in yield of blue spirea ( Caryopteris incana ) when plants were grown under 55% shade compared with full sunlight