What was madame c j walker hair growth product?

Madam Walker developed a system and regimen of hygiene and conditioning that cleansed her scalp and healed the scalp disease that was so rampant during an era when most Americans did not have indoor plumbing and electricity. Her first products were a vegetable shampoo and an ointment that contained sulfur, a medicinal agent that healed the sores on her scalp. She called it Madam Walker's Wonderful Hair Grower. It really didn't "grow" hair, but once her scalp was healthier her hair had a better environment in which to grow.
Today such ingredients are considered too heavy by many people, but they were a big improvement on what was available to most women in the early 1900s. Just as cars have improved in the last century, so have hair care products and cosmetics.