Diy Hair Growth Treatment . Apply many drops of castor oil to the scalp and massage it in thoroughly. Add 1/2 a cup of water to dilute the mixture (and make it less sticky). Homemade lotion for hair loss Hair loss cure, Best hair loss from www.pinterest.com Warm the olive oil mixture and gently massage the scalp with it in circular motions. Apply the mask directly to dry, brushed. Add 1/2 a cup of water to dilute the mixture (and make it less sticky).