Quercus palustris 'Emerald Pillar' [sold as Green Pillar®]
Green Pillar Pin Oak

Family:

Fagaceae (Beech Family) 45

Genus:

Quercus (Oak) 32

Plant Type:

Tree 559

Growth Forms:

Columnar 42

Hardiness:

USDA Zone 4 489

Deciduous / Evergreen:

Deciduous 794

Flower Notes:

Green (Yellowish-green, monoecious catkins in the spring; not ornamentally important)

Foliage Notes:

Green (Lustrous, fine textured summer foliage); Red (Attractive scarlet fall foliage)

Fruit Notes:

Brown (Acorns in fall; attractive to wildlife)

Ultimate Height:

40-50 feet

Ultimate Spread:

15-20 feet

Light Requirements:

Soil Notes:

Requires acid soil and will develop severe iron chlorosis on calcareous soils

Range:

Cultivated Origin

Diagnostic Characteristics:

Alternate leaves (3-6" long) are 5-7 lobed. U-shaped leaf sinuses (Quercus coccinea has C-shaped sinuses). Blade is somewhat "V"-shaped at attachment with petiole. Small acorn (1/2" long) with nut enclosed only at base by a thin, saucer-like cup.

Special Characteristics:

Fall Color 206

Patio Tree 125

Slow Growth Rate 266

Wet Soil Tolerant 102

Additional Information

This cultivar is a columnar habit, great for those smaller spaces. Its fall color is a vibrant red, which leads many to believe that the Scarlet Oak, (Quercus cocinea) is in the genetics of this cultivar. Green Pillar Pin Oak is grafted onto root stock, so graft incompatibility may be an issue in the future. Requires an acidic soil and is subject to severe iron chlorosis on calcareous soils. This can be corrected but it means additional maintenance.