Dry lusterless hair. Of cold westher?

I m 24. I used to have a lot of split ends in my hair. I was fed up of cutting my hair short each time ,cuz I wanted long healthy hair. Apart from having split ends I never had any other problem like dandruff and my hair would always be smooth and straight. A few days back I saw this home remedy on net where curry leaves are put in castor oil , and coconut oil and boiled and strained and applied to hair for healthy and long growth. I tried that oil. Now I dunno if there is any connection but after I applied that oil my hair has become ridiculously frizzy , dry , brittle and lusterless. At least earlier I had lustrous and smooth hair. I used ayurvedic shampoo and conditioner. Or could this be becuz of cold westher ? What ever the reason.. I really want back my smooth hair . Pls advise any remedy that works faster. I 'll stop using that curry leave oil.. thank u