How much condition should we apply

Hi Ladies,

After taking a head bath how much condtioner shoud we apply,
Bcoz i equally apply castro oil with coconut and i will apply to my hair and even to the ends equally before 4hours,
After taking a head bath i will apply the conditioner to the edges of the hair also
but my hair looks so soft that day and nxt immediate day it turns to dry and life less
it is staying only 1 day, 3 days once i will take a head bath
what should i do
please help me