Carstens Pine aka Carstens WIntergold Mugo Pine Green-Yellow HW1.5Fx2F
Botanical Reference: Pinnus mugo
 
 
A dwarf spreading evergreen conifer. Short needles are light green in spring and summer, then turn to rich gold in winter. Cold climates will notice more intense color. Easily one of the best of all winter-gold pines. Prefers full sun in well-drained soil. 1.5' tall x 2' wide in 10 years. Hardy to -50 degrees. USDA zone 2-8.
 
American Conifer Society Attributes
Pinus mugo 'Carstens' / Carstens mugo pine
RECOMMENDED HARDINESS ZONES:2 (-40 to -50 F / -40 to -45.6 C)
HORTICULTURAL STATUS: EstablishedORIGIN: Seedling SelectionCOLOR: Seasonal Variation GROWTH SHAPE: Cushion or Bun ShapedGROWTH SIZE: Dwarf: 1 to 6 inches (2.5 – 15 cm) per year / 1 to 5 feet (0.3 – 1.5 m) after 10 years
 
Pinus mugo 'Carstens' is a small, dwarf selection of mugo pine. Overall its structure is cushion-shaped becoming a flattened globe with age. Needles are typical of the species and are a pleasant medium green in the summer, becoming a rich golden yellow in the winter. 'Carstens' is considered by many to be one of the best of the "winter-gold' pines. Another distinguishing feature is a late season push of shorter needles, creating the effect of a crown at the end of each terminal branch. After 10 years in the garden, a specimen to be mature at 18 to 24 inches (45 - 60 cm) wide and half as tall, suggesting an annual rate of growth of 1.5 to 2 inches (3.5 - 5 cm).
 
Origin:
This cultivar originated as a special seedling selected in the mid-1980s by Erwin Carstens of Varel Germany; and introduced to the nursery trade in 1988 by Hachmann nursery, Barmstedt, Germany. Many nomenclatural errors exist for this cultivar, the most common of which is 'Carsten's Wintergold' which is incorrect on two counts — a misspelling of the Carstens family name and the addition of "Wintergold" which confuses this cultivar with P. mugo 'Winter Gold' which is another cultivar, entirely. This plant was one of three plants selected in 2013 for inclusion into the ACS Collectors' Conifer of the Year Program.
 
Public Display:
The Smits Pinetum
Lottum
The Netherlands