One of my best growers is "Elfin Shadows" (one of Lucy's). It seems to be just a bit of a slow starter (didn't bloom for me the first season...just made increase) but it's been a bloomin', growin' fool ever since !
ELFIN SHADOWS (Lucy Burton 2002 / 04)
another exceptional grower, here, is one that is sometimes seen "re classed". Joseph's Coat Katkamier grows as an MTB for me...in class, and in season...and is also a real dependable bloomer.
JOSEPH'S COAT KATKAMIER (Katkamier 1930)