I am attempting to grow sweet potatoes in glass jars filled with water. Today I noticed some leaf growth but it was all under the water! In all the literature I read the leaves are suppost to sprout over the water, not under. I am worried that they may drown. Please tell me if this is normal and I should just leave it as is or if I need to transplant. They aren't even an inch long.

This is my first time growing sweet potatoes, and advice would be appreciated.