The easiest way to propagate daylilies is to split your plants.  This method is recommended any time after 3-4 years of initial planting and can be completed successfully when carefully executed.  Transplanting may be done in Spring or Fall.

Step 1:  Carefully dig the whole clump out of your garden with a garden fork.  Take care to dig well back from the base of the fans to include all of the buried roots.

Step 2:  Shake as much of the excess soil off the plant as possible.  A good gentle shaking will also help loosen divisions.

Step 3:  With a garden hose, spray all of the roots and remove as much of the soil as possible.  If the root system is very large and intertwined soaking the clump in a bucket of water for 20 min will help and respray until the soil is removed.  This will make separating the fans much easier and safer for your new growing stock.

Step 4:  Separation of the fans.  This step may vary with the variety of hemerocallis you are dividing.  Some varieties separate easily and will fall apart as the soil is removed, other varieties grow in groups and remain attached to each other in a sharing of roots.  It is very important that each fan to be divided has a separate root system.  A connecting root can be cut but the remaining system must be large enough to support and feed the plant.  If there is doubt I usually do not divide that section but instead will leave several fans together and plant them as is.  Sometimes a growing sprout emerges from the bottom of the system and this rarely has its own root, as a result it should be planted with another fan as it will not survive on its own.
IMPORTANT:  Never allow roots to dry out!  Store in a bucket of water and place in a shady area until replanted.

Step 5:  Trim leaves to 6-8” with scissors.  This forces your new plant to put energy into growing roots when first planted instead of trying to support the large leaf area. 

Step 6:  Planting.  Loosen soil and dig a hole large enough to accommodate the roots system you are planting X2.  Spread roots and backfill.  Be sure the basal plate (where the root system and the leaves join), is at ground level or slightly above.  If planted too deeply the new plant will rot.  Water in well with a mix of water and transplanter such as 5-12-5 liquid form.  This will encourage new root growth and give your plant a good start.