Funny when I did nothing but wash my hair and put some leave in conditoner and slap it in a too-tight ponytail I think I got way more than an inch a month. Now that I acctually take care of my hair i think i probably get 1/2in to 1in a month. I don't measure my hair. But I went from middle of ear length to almost chin length (one and a half more inches to go). Hope I Helped.