Yep. There Is a product called " mane and tail" ... It's actually used for show horses to help their manes grow.. They sell it at Sally beauty supply... It did wonders for my hair without being too greasy or weighed down... it's basically a leave-in conditioner! Good luck!!
Yes you can use Avocados that are mashed up Mixed with mayonase and Leave it on your hair for 10 minutes then washing and Condition do this once a Week and your hair should gros up to Inches per year make sure to get your hair trimmed every 2 months
I started using Pro Mend products about a month ago, and it really made most of my split ends disappear... which also made my hair look longer and healthier, you should try it!! get the whole system... shampoo, conditioner, and treatment.
Genetics has MUCH to do with hair growth, but it's important to make sure you don't mechanically damage your hair, no heat, no brushing. Wash and condition with GOOD shampoo/conditioner, and massage your scalp. These things combines with a healthy lifestyle and vitamins should help tremendously. Don't forget your water!