A.  Daylilies should be divided for several reasons.  One reason is to start new plants for your gardening friends.  Another reason to divide clumps is to keep the plants healthy.  When a clump becomes too large, the flowers become smaller and less numerous.  You won't have to divide daylilies every year.  Most varieties need to be divided every four or five years.  The best time to do this for our area is in the Fall when the weather begins cooling off like in late October or early November.  This can also be done in early Spring.

The easiest way to divide the plants is to dig up the whole clump with a fork to avoid damaging the roots.  Cut back the foliage to three or four inches above the soil line.  Rinse off the soil so you can see the many fans before separating them.  The next step is to cut the fans apart with a clean, sharp knife.  After splitting up a clump, plant the new divisions in a sunny, well-drained location.  Daylilies require a minimum of six hours of sun a day.  Any good garden soil is fine for daylilies.  They grow best in well-drained soil with the addition of organic compost to increase water retention.  Humus or peat moss as well as sand may be added to our heavy clay soil.  Plant the clumps one inch deep and 18-24 inches apart.  Plants set too deep into the soil won't bloom well.

Daylilies should last a lifetime.  If the daylilies don't bloom well the first year after dividing, the reason is it takes time for the fans to develop.  Daylilies are one of the most rewarding perennials because they have few disease and insect problems.  By selecting varieties of daylilies with different blooming times and repeat blooming, the gardener can have plants blooming for several months from Spring and late Summer.


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