Grapeseed oil is excellent for hair because it contains vitamin E, flavonoids, linoleic acid, and OPCs, all of which are necessary for healthy hair growth and vitality.
Black tea hair rinses are widely used to promote hair growth, as the tea’s high antioxidant and caffeine contents are believed to support a healthy scalp and hair
Advocates claim that the caffeine found in black tea can reach hair follicles to block dihydrotestosterone (DHT) — a hormone linked to hair loss in people with a condition known as androgenic alopecia 
High levels of DHT have been shown to shrink hair follicles and shorten the hair growth cycle, leading to weakened, brittle hair that falls out more easily
Green tea may support healthy hair growth and regrowth.
In one small study, researchers added topical green tea-derived EGCG extract to the scalps of three participants with alopecia. After 4 days, the participants experienced significant increases in hair growth activity
EGCG appears to increase hair growth by stimulating hair follicles and preventing damage to skin and hair cells (https://www.healthline.com/nutrition/green-tea-for-hair#hair-benefits)
A 2014 study indicated that a mixture of coconut oil and black seed oil was effective enough in promoting hair growth to justify further study.
Also, a 2017 study indicated that an herbal hair oil containing Nigella sativa resulted in hair fallout reduction of up to 76 percent. (healthline.com/health/black-seed-oil-for-hair#black-seed-oil-for-hair)
Infused Grapeseed Oil (Cold Infused Gunpowder Green and Assam Black Tea), Black Seed Oil(Nigella sativa)
*Apply to scalp up to once a day. Massage slowly while applying to ensure even spread and absorption.*