We sometimes receive questions as to whether asparagus or rhubarb can be moved in the fall. Though these crops are traditionally transplanted in the spring (mid-March to mid-April), a fall move can be successful. Wait until the top has been browned by frost and then cut back to the ground.
Prepare the soil and fertilize as you would in the spring. See http://www.bookstore.ksre.ksu.edu/pubs/mf319.pdf for more detail on asparagus and http://www.bookstore.ksre.ksu.edu/pubs/ep99.pdf for more information on rhubarb.
Water well after planting to ensure good root/soil contact. Mulching would be helpful on the rhubarb to prevent the plant from heaving out of the soil during the winter but asparagus requires no such treatment as it is planted much deeper. (Ward Upham)
Photo credit: liz west