Flowering and Fruiting of Chinese Jujubes in Florida

Eighteen cultivars of the Chinese jujube ( Zizyphus jujuba Mill.) grown in Florida comprised 2 flowering types based on the time of day when the flowers open. Flowers on 10 cultivars open each day between 0700 and 1000 hr and on the other 8 between 1400 and 1700 hr . Despite ample opportunity for cross-pollination and intense activity by pollinating insects, some cultivars set little or no fruit. Cultivars that fruit heavily and reliably are parthenocarpic. Supplemental light in the fall prolongs flowering and fruiting and could substantially increase yields.