Bloom Season


That portion of the growing season when a particular cultivar is in bloom. The seasons are categorized in rather loosely defined periods labeled as:


  EE = Extra Early - bloom 2-4 weeks before mid-season
  E = Early - bloom 2-4 weeks before mid-season
  EM = Early Midseason - bloom 1-2 weeks before mid-season
  M = Midseason - bloom at “peak bloom” time
  LM = Late Midseason - bloom 1-2 weeks after mid-season 
  L = Late - bloom 2-4 weeks after mid-season
  VL = Very Late  - bloom later than 2-4 weeks after mid-season.


These categorizations are those provided by the hybridizer and shown on the AHS database.




A blank would indicate that the hybridizer did not register this cultivar as a reblooming variety.

A “R” would indicate that this cultivar was registered as a rebloomer.

A “D” would indicate that this cultivar has demonstrated some degree of rebloom at Dreamy Daylilies.


Please note that a D or an R is not a guarantee that this cultivar will rebloom given your garden conditions.




A blank would indicate that fragrance is lacking.  A “Y” would indicate that fragrance is evident. A “V” would indicate very fragrant.


These categorizations are those provided by the hybridizer and are as shown in the AHS database.




This term refers to the winter behaviour of daylily leaves. A hybridizer will register a cultivar as either dormant (DOR), semi-evergreen (SEV) or evergreen (EV). This indicates how the cultivar’s foliage passes winters in the hybridizer’s garden, but is not necessarily an indication of how it will behave elsewhere under differing environmental conditions. Note that hardiness and foliage habit are inherited separately, thus not all evergreens are tender and not all dormant plants are hardy.




  • DIPLOID (or D):   A plant having two complete sets of the basic set of chromosomes. A diploid daylily has 22           chromosomes. One set of 11 comes from the egg cell, one set from the sperm cell in the pollen.
  • TETRAPLOID (or T):  Having four sets of chromosomes in each cell of the plant (in daylilies, 44 chromosomes         altogether.) That is twice the number found in the sex cells (sperm and egg).
  • TRIPLOID:  There are a very limited number of daylilies that are triploid – Kwanso being one.  So far, these               tend to be sterile  and multiply predominantly using rhizome reproductive methods. 





Within the “Other” field, information is provided that includes other plant features such as:

  • Ext. – extended bloom – flowers that remain open 16 hours or more.
  • Noc. – nocturnal bloom –   A flower that opens sometime after late day and remains open during the night and           perhaps all or part of the following day
  • Double –   A double flower has more than one petal whorl (hose-in-hose double), or a stamen whorl that contains     petaloid (petal-like) stamens (peony type double).   A plant that is registered as “double” will normally, but not           necessarily double with each and every flower.  
  • Spider – A flower whose petal length is four times the petal’s width or more, a ratio of 4.0:1 or greater.
  • UFO – Unusual Form – The flower of a UFo class daylily must have “distinctive petal, sepal or a combination of       both petal and sepal shapes”


Also within the “Other” field is a listing of those awards and honors earned by the cultivar as awarded by the AHS.  These awards are presented annually and specifically are:

  AM = Award Of Merit
  HM = Honorable Mention
  JC = Junior Citation
  LAA = Lenington All American Award – AHS Second Highest Honor
  DFM = Donn Fischer Memorial Award – Best Miniature Cultivar
  ATG = Annie T. Giles Award – Best Small Cultivar
  IM = Ida Munson Award – Best Double Cultivar
  DCS = Don C. Stevens Award – Best Eyed Cultivar
  ESF = Eugene S. Foster Award – Best Late Blooming Cultivar
  HOS = Harris Olson Spider Award – Best Spider Form Cultivar
  L/W = Lambert/Webster Award – Best Unusual Form Cultivar
  RW, = R.W. Munson, Jr. Award – Best Unusual Pattern Cultivar
  ESB = Early Season Bloom Award – Best Early or Extra Early Cultivar
  XLD = Extra Large Diameter Award – Best Extra Large Diameter Cultivar
  PC = President’s Cup – Best Cultivar on Garden Tour
  FS = FloridaSunshine Cup – Best Small or Miniature on Garden Tour
  GD = Georgia Doubles Award – Best Double on Garden Tour
  NRS = Ned Roberts Spider/UF Award – Best Spider/UF on Garden Tour
  LEP = L. Ernest Plouf Award – Most Fragrant Cultivar (discontinued)
  RPM = Robert P. Miller Memorial Award – Best Near-White Cultivar (discontinued)
  RCP = Richard C. Peck Memorial Award – Best Tetraploid Cultivar (discontinued)
  JEM = James E. Marsh Award – Best Purple or Lavender Cultivar (discontinued)