Kalash Sthapana or Ghatasthapana is the most important ritual performed on the first day of the Navratri festival.
Ghatasthapana or Kalash Sthapana is basically invoking the mother Goddess in a Pot or Kalash and sowing of seeds which grow by the last day of the festival which is Maha Navami or the next day i.e., Dusshera.
In 2018, Shardiya Navratri will be celebrated from 10th to 19th October 2018.
Muhurat Timing for Kalash Sthapana / Ghatasthapana for Navratri 2018 :
As per hindu panchangam, the best time to perform the ritual of Navratri Ghatasthapana is on 10th October 2018 from 06:13 to 07:25 am IST.
You can also do the Kalash Sthapana during Abhijit Muhurta (None Exists this year on this day).