Green tea and hawthorn in hair?

Does anyone know if it's ok to leave green tea in the hair? After washing my hair with yolk/rueflour mix, I finished off by rinsing my hair with green tea, and I just left it in.
Can it damage the hair, when I leave it in?

And does anyone know if hawthorn tea rinse can help reduce the scalps production of sebum? And if so, then how?

It's okay to leave green tea in your hair :)

Thanks. It does feel nice :)

Normally I soak my hair in green tea before taking a shower and then wash it out. I found it gives a nice shine to it. Though when I decided to use it as a rinse one day and left it in that same shine was not there. It didn't damage my hair though, so nothing wrong with it I suppose =p