http://durgan.org/2016/December%2020...20Slips./HTML/ 4 December 2016 Sweet Potato Slips
The last of my sweet potato from the 2016 crop was set aside to grow six slips. My procedure is to place the potato in soil just below the surface and let it grow in light. The slips grew well (25 days) and were removed and placed in water for about a week to develop stronger roots. Then they will be planted in a pot to grow, until planted in the outdoor garden. I find the growth is excellent using this method, and it is convenient since only six plants are required.