After weeks of unplantable (is that a word?) weather ,I finally got my vegetable garden and dahlias planted last week. As I was cleaning out my tool shed today,I found a paper bag with two more dahlia tubers I had forgotten. These tubers have sprouts that are nine inches long with leaves forming. I recently posted a question about planting tubers with three inch sprouts and was told I could cover the entire tuber and sprout with soil. Should I trim off some of this long sprout or just sort of "spiral" it under the soil? I don't want to plant them too deep,but doubt I should leave very much out of the ground. Your help is very much appreciated by this newbie gardener.