Shade and Photoperiod Influence Caryopteris incana Used as Cut Flowers

Abstract

<jats:p>Plants of blue spirea <jats:italic>(Caryopteris incana</jats:italic> 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.</jats:p>

Effect of Colored Shadecloth on the Quality and Yield of Lettuce and Snapdragon

“…However, shade (30%, 47%, 63%, or 73%) did not affect crop yield of 'Parris Island Cos' lettuce, 'Waianae Strain' green mustard cabbage (Brassica juncea), 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 in field condition approximated in May at the University of Georgia (Athens). However, shade significantly increased stem length.…”