Planting Hydrangea Bulb that has sprouted
For Christmas I got a Hydrangea bulb in a box with a vase, it said put the bulb on top of the vase, fill it with water to the bottom of the bulb and keep it in a dark place until it sprouts two inches, then plant it. But it didnt explain how to plant it. So my bulb has about 2 inches of plant sprouting out the top and about 5 inches of roots coming out of the bottom. I planted in it my garden two days ago, but I think I did it wrong. I planted it so the top of the bulb was level with the ground, so the stalks are above the ground. Is this right? Should I dig it back up and plant it further underground? Should the stalks even be underground? Thank you. I dont know exactly what kind of hydrangea it is.