油葵種子的施肥是很有講究的，施肥好產量高，施肥不好只會顆粒無收。
施用方法有條施、撒施、穴施三種，其中基肥集中條施，肥料靠近向日葵根系。條施是施肥前把肥料搞細，隨耕地把肥料施入犁溝內。撒施是在耕地前把肥料均勻撒在地面，然后耕翻入土內。穴施一般是在肥料較少的情況下集中施肥。
在種(zhong)肥(fei)(fei)(fei)(fei)(fei)(fei)的用(yong)(yong)量上(shang)應根(gen)據(ju)各地經驗，衡量土壤(rang)肥(fei)(fei)(fei)(fei)(fei)(fei)力水(shui)平、基(ji)肥(fei)(fei)(fei)(fei)(fei)(fei)用(yong)(yong)量多少(shao)、栽(zai)培方式不同而定。土壤(rang)肥(fei)(fei)(fei)(fei)(fei)(fei)沃，基(ji)肥(fei)(fei)(fei)(fei)(fei)(fei)用(yong)(yong)量又(you)多，可少(shao)施(shi)種(zhong)肥(fei)(fei)(fei)(fei)(fei)(fei)；地力瘠(ji)薄，基(ji)肥(fei)(fei)(fei)(fei)(fei)(fei)用(yong)(yong)量又(you)少(shao)，應增(zeng)加種(zhong)肥(fei)(fei)(fei)(fei)(fei)(fei)數(shu)量。用(yong)(yong)氮素化(hua)學肥(fei)(fei)(fei)(fei)(fei)(fei)料(liao)，一(yi)般每(mei)畝施(shi)純氮1.5干克左右；用(yong)(yong)磷素化(hua)學肥(fei)(fei)(fei)(fei)(fei)(fei)料(liao)，每(mei)畝施(shi)純磷2千克左右；用(yong)(yong)鉀(jia)素化(hua)學肥(fei)(fei)(fei)(fei)(fei)(fei)料(liao)，每(mei)畝施(shi)純鉀(jia)3~5干克。