Now a couple of weeks have passed and the slip is tall enough for me to snap it. I put the slips into a separate container and wait patiently again for the roots to grow. When the weather is warm enough, I will plant the slips directly into the garden. One thing I learn from a book is that it would be very helpful if we place a clear plastic film tight on the soil where the sweet potato is going. This would warm up the soil much quicker since we only have a short growing season here in Canada.