Absence of mulch prevents a hiding place for slugs. Maintenance during the bloom season includes regular watering and deadheading spent blooms. The scapes grow past most of any slug damage. Thrips can be a daylily pest, but are not a major Upstate problem. There are few, if any, reasons to spray daylilies.
Daylilies allow an easy means of propagation by division.
Although division can be done in early Spring, when 3 - 6 inches of foliage is present, the ideal time for division is early Fall after blooms end. Dividing and replanting clumps at that time allows four weeks for roots to re-establish before the ground cools. The following season's results depend on size and quality of the transplanted division. There is no guarantee of bloom the season following a Spring or Fall transplant. It is in the division of his collection that Charlie Zettek has become known to area daylily lovers.