Abies cephalonica 'Greg's Broom' is broadly spreading dwarf selection of Greek fir with bright, grass-green needles that have a slight curl to them allowing attractive silvery undersides to glisten in the sunlight. Plants are globose when young, later becoming flattened and spreading with age. After 10 years, a mature specimen will measure 24 inches (60 cm) wide and 12 inches (30 cm) tall, a growth rate of 2 inches (5 cm) per year.
This cultivar originated as a witch's broom found in the early 1990s by Greg Williams of Wolcott, Vermont at the H.H. Hunnewell Estate in Wellesley, Massachusetts where he is said to have found several witch's broom of various species. There is a great deal of nomenclatural difficulties with this cultivar and a similar cultivar, Abies nordmanniana 'Broom H.' Both of these plants have been seen confused with each other as well with Abies cilicica on the specific level. In addition, the cultivar names, 'Greg's Broom,' 'Greg Williams,' 'Hunnewell' (Hunnewell Broom, W.B., etc), and 'KBNG' have been noted to be assigned to them all. This appears to have been caused by Mr. Williams distributing unlabeled scionwood to various grafters and not wanting to tip off the world as to the whereabouts of his brooms.