實shi踐jian證zheng明ming，核he桃tao屬shu異yi花hua同tong株zhu植zhi物wu，花hua期qi一yi般ban在zai四si月yue中zhong下xia旬xun。雌ci花hua芽ya為wei混hun合he芽ya，春chun季ji萌meng發fa後hou抽chou生sheng結jie果guo枝zhi。雄xiong花hua芽ya為wei裸luo芽ya，散san粉fen後hou脫tuo落luo。花hua粉fen黃huang綠lv色se，靠kao風feng傳chuan播bo
，有you效xiao傳chuan粉fen範fan圍wei200米左右。核桃的雌花和雄花往往不能同時開放，盛花期相差3~10天。有的品種雌花先開，雄花後開，雌先型；youdepinzhongxionghuaxiankai
，cihuahoukai，xiongxianxing。cixianxingdepinzhongxionghuakaifangshi，cihuazhutouyiweinian
，shiqujieshouhuafendenengli，xiongxianxingdepinzhongcihuakaishishi
，xionghuayituoluo，shiqushoufenjihui。weishoufendecihuaduoshuhuituoluo，shaoshuyenengfayuchengguoshi，danzhongrenganbie
，xingchengkongke
，yingxiangchanliang，suoyi，hetaojianyuanshiyaozhuyipeizhishoufenshu。

常見雌先型的品種有綠波、香鈴、中林1號等
，雄先品種有遼寧1號

、魯光、fenghuideng
，ruguozhuzaipinzhongshicixianxing
，shoufenpinzhongyingxuanxiongxianxing，zhuzaipinzhongshixiongxianxing，shoufenpinzhongzeyingxuanxiongxianxing。hetaoyuanyibanzhixuanyigezhuzaipinzhong
，yibaozhenghetaochanpindeyizhixing。shoufenpinzhongkexuan1~3個，授粉樹的配置比例可按1:8或1:10，即每隔8~10行配置一行授粉樹。