Table 2.

Average percent canopy with winter color change across boxwood cultivars in 2021 and 2022.

Mean (± SD) % canopy with winter pigment changea
20212022
Boxwood speciesCultivar/selectionN21-Febb02-Apr11-May23-JulN09-Mar
Buxus balearica Balearic36.7 ± 2.9 gh0.0 f0.0 c0.0 c30.0 b
Buxus harlandiiRichard41.3 ± 2.5 h2.5± 5.0 ef0.0 c0.0 c40.0 b
Harland40.0 h0.0 f0.0 c0.0 c40.0 b
Buxus microphylla Borderline40.0 h0.0 f0.0 c0.0 c40.0 b
Golden Dream492.5 ± 6.5 a2.5 ±2.9 ef0.0 c0.0 c40.0 b
Grace Hendricks Phillips435.0 ± 4.1 defgh0.0 f0.0 c0.0 c45.0 ± 0.0 b
Green Beauty47.5 ± 2.9 gh0.0 f0.0 c0.0 c40.0 b
Green Pillow427.5 ± 2.9 efgh5.0 ± 0.0 def0.0 c0.0 c46.3 ± 2.5 ab
Jim Stauffer48.8 ± 2.5 gh0.0 f0.0 c0.0 c40.0 b
John Baldwin452.5 ± 18.9 abcdefg0.0 f0.0 c0.0 c40.0 b
Korean42.5 ± 2.9 h0.0 f0.0 c0.0 c40.0 b
Little Missy46.3 ± 2.5 h0.0 f0.0 c0.0 c43.8 ± 2.5 b
Morris Dwarf422.5 ± 15.0 fgh0.0 f0.0 c0.0 c45.0 ± 4.1 ab
Morris Midget420.0 ± 7.1 gh3.8 ± 2.5 ef0.0 c0.0 c410.0 ± 7.1 ab
Buxus semper-virens American3100.0 ± 0.0 a98.3 ± 2.9 a83.3 ± 11.5 a88.3 ± 11.5 a1100.0 ab
Aurea-Pendula3100.0 ± 0.0 a0.0 def0.0 c0.0 c30.0 ab
Buddy496.3 ± 7.5 a71.3 ± 25.9 b35.0 ± 31.9 b56.3 ± 40.3 b25.0 ± 5.0 a
Dee Runk468.8 ± 7.5 abcde21.3 ± 13.1 cde3.8 ± 4.8 c0.0 c225.0 ± 7.1 ab
Elegantissima40.0 h0.0 f0.0 c0.0 c40.0 b
Fastigiata471.3 ± 7.5 abcde23.8 ± 11.1 cd11.3 ± 9.5 c0.0 c215.0 ± 21.2 ab
Graham Blandy371.7 ± 10.4 abcde1.7 ± 2.9 ef0.0 c0.0 c336.7 ± 11.5 ab
Justin Brouwers471.3 ± 42.5 abcde0.0 f0.0 c0.0 c410.0 ± 5.0 ab
Longwood3100.0 ± 0.0 a0.0 f0.0 c0.0 c30.0 b
Piney Mountain443.8 ± 7.5 cdefgh2.5 ± 5.0 ef0.0 c0.0 c222.5 ± 17.7 ab
Rotundifolia415.0 ± 7.1 gh0.0 f0.0 c0.0 c40.0 b
Tall Boy277.5 ± 3.5 abcdef10.0 ± 7.1 cdef0.0 c0.0 c25.0 ± 7.1 ab
Vardar Valley476.3 ± 18.0 abcd30.0 ± 20.0 c0.0 c0.0 c150.0 ab
Variegata30.0 h0.0 f0.0 c0.0 c30.0 b
Water Fall393.3 ± 5.8 ab5.0 ± 5.0 def0.0 c0.0 c35.0 ± 0.0
Buxus sinica var. insularis Franklin’s Gem42.5 ± 5.0 h0.0 f0.0 c0.0 c40.0 b
Nana428.8 ± 36.6 efgh1.3 ± 2.5 f0.0 c0.0 c42.5 ± 5.0 b
Tide Hill328.3 ± 12.6 defgh1.7 ± 2.9 ef0.0 c0.0 c30.0 b
Buxus hybridChicagoland Green438.8 ± 2.5 defgh0.0 f0.0 c0.0 c45.0 ± 0.0 ab
Freedom255.0 ± 63.6 abcdefgh2.5 ± 3.5 def0.0 c0.0 c222.5 ± 10.6 ab
Gordo Conroe390.0 ± 10.0 abc0.0 f0.0 c0.0 c30.0 b
Green Mound490.0 ± 20.0 ab0.0 f0.0 c0.0 c225.0 ± 7.1 ab
Green Mountain442.5 ± 9.6 cdefg0.0 f0.0 c0.0 c40.0 b
Green Velvet3100.0 ± 0.0 a18.3 ± 18.9 cdef0.0 c0.0 c150.0 ab
Independence255.0 ± 63.6 abcdefgh0.0 def0.0 c0.0 c20.0 ab
Nicholson252.5 ± 17.7 abcdefgh2.5 ± 3.5 def0.0 c0.0 c22.5 ± 3.5 ab
  • a Statistical analyses were conducted for each rating date independently and presented in this table as such.

  • b Means with separate connecting letters are statistically different based on Tukey’s Honest Significant Difference test within each individual rating date.