Sadhana is the purification of inner self/mind to make one ready for merging into divine oneness of God ; which comes after graciousness of the Guru only.
At Atma Kutir Guruji helps interested disciples to taste this nectar.
At Atma Kutir devotees practice various duration/type of Sadhana ranging from 07 to 90 days. Duration/ starting of Sadhana depends on purity of applicant and grace of Guruji.