All,
There are many factors that can effect daylily reblooming in the north or elsewhere. The bottom line, however, relates to the genetics of the
particular daylily. Here in the north I have discovered that certain diploids and tetraploids have recessive reblooming genes that can be triggered by
warmer weather. These can produce repeat blooms, i.e. one or more new scapes are formed after the first set of scapes have finished blooming.
Several Barth Daylilies (available at O'Donal's Nursery in Gorham, Maine) have been repeat bloomers, including: HOPE HALL, SARAH SCALLY,
DAMARISCOTTA RIVER GREAT PUMPKIN, and FLYMAN. Continuous bloomers continue to throw scapes throughout the daylily growing season.
Good continuous bloomers are much more difficult to develop. Over many years I have worked with many so-called continuous bloomers which
have proved problematic in the north. A picture of HOPE Hall is attached below. Wonderful diploid daylily.
