You need to pot this bulb on a well-draining soil. Cactus/succulent mix is good option. Place the bulb in the soil
Stephania plant needs to be watered 1-2 times a week, depending on temperature. The soil should come to moist and not soggy. Let the soil also dry between waterings to avoid root rot.
You can place Stephania bulb under direct sunlight which will wake it up and activate it to get stem. But keep it away from hot summer sunlight, it can burn leaves.Stephania will normally loose all the green growth at winter/dormant time.