General Information on DayliliesPlant Habit
The modern daylily is a long way from its origins. As interesting as it is, we will not go into its history. (“The Gardener’s Guide to Growing Daylilies by Diana Grenfell” is a good reference book.)
Please note that the modern daylily is not to be confused with the orange ditch lily. The ditch lily is quite tall, beautiful and has a very invasive root system. Due to its odd number of chromosomes (33), it cannot produce viable seed. The modern daylily has a clumping habit, an even number of chromosomes and does produce viable seed.
To add to the confusion a daylily is not really a lily. Back in the 1700-1800s the daylily was placed in the lily family. A re-evaluation of this decision in the 1900s took it out of this family and placed it in a new family of its own called Hemerocallis (from the Greek hemera meaning a day and kallos meaning beauty). However the Hemerocallis name has never really “caught on” and to this day it is generally known as the daylily.
Due to extensive hybridizing by some very dedicated growers the daylily has a wide variety of colours, flower size, heights, and combinations which are almost endless. The only colours not recognized as pure are blue and white. We have some whites that are very close to pure white such as Joan Senior (Durio) and some others with near blue eyes.
The daylily is almost the perfect perennial. With its endless variety of characteristics it fits all gardens. It has very few diseases or predators. Although totally edible, the deer have not touched our daylilies yet!
We have had numerous complaints about daylilies (not ours) and it has turned out they are normally tissue culture. Please refer to Tissue Culture.
In our zone 4b the EE-very early will bloom about mid June and the remainder of the daylilies will follow until frost. It is true that a single bloom lasts one day! However, when a daylily has numerous scapes (flower stems) and 20 to 40 buds per scape, you can enjoy a spectacular bloom over a long period of time. EX-extended bloom means that the daylily continues to produce scapes and blooms over a long period. RE- re-blooming daylilies will bloom in season and then bloom again, usually in the fall. As with most plants the re-bloom is not as spectacular as the original. Some daylilies which are classed as re-bloomers do not rebloom in our zone 4b due to the shorter season. Re-bloom in Florida is quite different than in Canada. When we say the daylily re-blooms, it does so for us in a normal season.
Some Major Daylily Awards
Daylilies are very flexible as far as planting times and soil conditions. They can be split and planted from early spring to about Sept. 1 in our zone 4b and to Sept.15 in zone 6.(You can judge for yourself according to your zone.) I would always water them in well when planting, especially in hot weather. They like damp , high humus, well drained soil, but will survive quite well in adverse conditions. If you give them good soil, water and fertilizer they will reward you over and over again.
We feed our gardens twice per year by hand broadcasting a granular fertilizer with a large centre number (e.g. 8-32-16) which we purchase at our local farm supply. The fertilizer is applied once in late spring, and once in late July. Do not fertilize too late in the season as new growth is sensitive to winter kill. When we plant daylilies in the garden I put about 1/3 of a bag of well rotted cow manure in the hole, mix with the soil and Wow! do they grow.