Yes According to the video of watermelon query, winter jujube in greenhouse should be irrigated effectively when the temperature is high, and watered lightly after the temperature drops in the afternoon or evening, otherwise it will be hot. Dongzao jujube is a cultivated variety of Rhamnaceae jujube, and it is a unique late-maturing fresh jujube in China. It originated from Zhaoshan Village, Xiawa Town, Zhanhua District, Binzhou City, Shandong Province, China.