Step 1 – Discard any unattached pieces of old roots or leafy remnants.
Step 2 – Select garden location that will receive shade or partial sun. After the ground has thawed, dig a hole six inches deep and wide enough to fit each root separately. 
Step 3 - Plant the clumps with the roots facing downward. Cover the top with an inch or two of soil and pack firmly around sides. Water them thoroughly.
Step 4 - In the garden, the clumps will sprout when the soil temperature rise sufficiently usually around late April to early May.
Step 5 – In the garden, they are hardy down to a minus 30 below 0 with just a little autumn mulching.