Table 2. Heights of trees (feet) grown for the first 2 years at Root’s Nursery in 9-cm (3.5-in.) shelters and at Nittany Trees in 9- and 18-cm (3.5- and 7-in.) shelters, compared to trees grown all 4 years without shelters (percentage of control).
Species, cultivarYears:FeetPercent
Root’s Nursery, 9 cm
Acer griseum3.
Cercis canadensis3.
Cornus ‘Celestial’
Malus ‘Adirondack’
Magnolia ‘Merrill’
Magnolia stellata1.
Syringa ‘Summer Snow’
Nittany Trees, 9 cm
Carpinus caroliniana2.*101160100
Cornus ‘Celestial’*103117114
Cornus ‘Constellation’*101108102
Magnolia stellata1.*10416188
Prunus serrulata ‘Kwanzan’
Prunus subhirtella autumnalis3.
Nittany Trees, 18 cm
Carpinus caroliniana2.*105189149
Cornus ‘Celestial’
Cornus ‘Constellation’
Magnolia stellata1.*119198102
Prunus serrulata ‘Kwanzan’
Prunus subhirtella autumnalis3.
  • * Some trees exhibited dieback.

  • Metric equivalents: 1 ft = 30.5 cm.