Hair Spa is Essential for Hair Growth

It is definitely not a necessity but u can surely indulge in the luxury to pamper yourself. There's no need to worry if can not afford to spend in the spa because the best natutal remedies lies in our home. Keeping yhe scalp clean always by frequent headbath will keep dandruff away and scalp and hair healthy too.
You can try various hairmasks too to keep the hair problems away and makebit shine.you can try curd+lemon before headbath or methi seeds soaked and ground to paste can also be applied.

 

yes, Hair Spa is good for hair growth and also for hair quality.

 

Hair spa helps to keep your hair smooth and shiny for 2-3 weeks.
I doubt it promotes hair growth.
For hair growth you can focus on balanced diet, workout and home remedies like oil bath, applying hair masks, etc.
I have read applying onion hair mask help to control hair fall and promotes hair growth. You can search this thread on IL.

 

Here are links :
1. http://www.indusladies.com/forums/hair-care-and-hair-styles/208453-have-you-used-onion-juice.html
2. 4 Easy Hair Masks for You to Try