Table 3. Calipers of trees (inches) grown 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:InchesPercent
Root’s Nursery, 9 cm
Acer griseum0.40.60.9606681
Cercis canadensis0.71.41.9729195
Cornus ‘Celestial’
Malus ‘Adirondack’
Magnolia ‘Merrill’
Magnolia stełlata0.51.01.4100106114
Syringa’Summer Snow’
Nittany Trees, 9 cm
Carpinus caroliniana0.*647156
Cornus ‘Celestial’*1046469
Cornus ‘Constellation’*925863
Magnolia stełlata0.*1007354
Prunus serrulata ‘Kwanzan’
Prunus subhirtella autumnalis0.
Nittany Trees, 18 cm
Carpinus caroliniana0.*839888
Cornus ‘Celestial’
Cornus ‘Constellation’
Magnolia stełlata0.*9410585
Prunus serrulata ‘Kwanzan’
Prunus subhirtella autumnalis0.
  • * Some trees exhibited dieback.

  • Metric equivalents: 1 ft = 30.5 cm.