Edwort is partially correct. Traditional german Hefeweizen brewers do use a lager yeast to bottle condition their hefe's. But, Wyeast 3068 is a hefeweizen ale yeast. After fermentation is complete, a lager yeast (not 3068) is added at bottling. Ferment your hefe (with 3068) as close to 62 - 64 degrees as you can.