Miscanthus x giganteus is a warm-season, perennial grass native to Asia that is currently being studied for biomass production. M. x g. is sterile and commonly propagated by rhizomes. Since 2004, cold storage, greenhouse field studies have been conducted in Urbana, IL, USA to determine the optimal temperature and duration for storing M. x g. rhizomes and the optimal size and depth for field planting M. x g. rhizomes. The cold storage study found that Miscanthus x giganteus rhizomes tolerate storage at 4° C for up to 4 months with little effect on the time required to break dormancy. Miscanthus x giganteus rhizomes of 20 g to 100 g were planted in the spring in Drummer silty-clay loam soil at 10 cm with 50 g to 60 g rhizomes proving to be the optimal size. Also, based on field-study results, Miscanthus x giganteus rhizomes planted at depths of 5 cm to 20 cm generally performed best when planted between 10 cm and 15 cm deep.