How can i get my hair to smell fantastic without using any kind of store bought hair product?

i'm trying to go for the smell of lemons.How can i get my hair to smell fantastic without using any kind of store bought hair product?
The only way is to buy certain shampoo or or maybe hairspray. You can't have your hair naturally smell like lemons. But if you really don't want to use hair products, then you could do something weird like getting lemon peels and bending them so the water sprays out of the peels and spray it toward your head...