I'm just wondering, is green tea good for hair growth?

Definitely maybe: As is often the case with herbal medicines, no definitive research studies have been done to answer this question. Green tea has many proven benefits but stimulating hair growth is not one of them; however, many claim it can help hair growth and it is certainly possible that it might. See http://www.Progressivehealth.Com/green-tea.Htm for an article discussing how it could potentially help.