This easy-to-use glossary will help you translate and define some of the botanical, horticultural and landscaping terms used on this site.
Click on a letter to view terms & definitions.
Remove old spent flowers. In plants that aren't self-shedding (like most daylilies), removal of spent blossoms improves the aesthetic appearance of the clump in the landscape. Whether one dead-heads or not is purely a matter of individual preference.
A diploid is a plant that possesses 22 chromosomes (two sets). Most plants are diploids.
Diploid daylilies also possess 22 chromosomes, 11 of which come from the egg cell in the pod-parent, with the remaining 11 coming from the sperm cell in the pollen.
A daylily is described as diurnal if its blossoms open in early morning or during the day. Early-morning opening is a desirable attribute of a daylily hybrid.
Method of propagating by separating parts from a plant to produce new plants.
The process of splitting a mature daylily clump into multiple portions in order to enhance the vigor of the clump or to produce more plants. The smallest division is usually a single fan, and the terms are often used interchangeably. Advertising of daylilies for sale often refer to single-fan divisions or double-fan divisions.
Dormant means deciduous. Dormant daylilies lose their foliage completely when frost arrives in the fall. They then remain leafless or without foliage for some period of time that varies both by cultivar and growing region. Dormancy may be affected by day-length and temperature changes.
A daylily blossom with more than six segments (three petals and three sepals). Some double daylilies have additional well-formed additional sets of blossom segments layered one upon another. These are referred to as hose-in-hose. Other doubles contains clusters of petaloids at the center of the blossom, much like double peonies. Deformed stamens often appear fused to these petaloids.
Daylily cultivars with blossom scapes less than twelve inches tall are referred to as dwarfs, regardless of blossom size.