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栀子花在北方栽培多数生长不好,少则半年,多则一两年,就由绿变黄,以至死亡。我将自己的一点防治经验写出来供参考。栀子花喜湿润和半阴环境,在 PH 值5.5～6的酸性土中才能生长良好。如长年日晒,盆土盐碱过重和缺铁,就会黄化、死亡。挽救的方法是:将长期黄化的植株移到通风阴凉处,根据黄化的不同程度,按一百斤水加半斤硫酸亚铁的比例调匀,经日晒三、四天后用来浇洒栀子,要干透浇透,干则再浇,不要中
Gardenia flowers in the northern cultivation most of the poor growth, ranging from six months, as many as a year or two, from green to yellow, and even death. I will write my own experience of prevention and control for reference. Gardenia hi moist and semi-Yin environment, the pH value of 5.5 to 6 in acid soil to grow well. If the sun for many years, basin salt and alkali overweight and iron deficiency, it will yellow, death. The salvage method is: the long-term yellow plants moved to the ventilated shade, according to different degrees of yellowing, according to a hundred pounds of water plus half a catty ferrous sulfate, the proportion of mix thoroughly by the sun after three or four days to pour Gardenia, to be thoroughly drenched, dry and then poured, not in