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

Also known as: Quercus palustris 'Emerald Pillar'

Family:

Fagaceae (Beech Family) 46

Genus:

Quercus (Oak) 33

Plant Type:

Tree 569

Growth Forms:

Columnar 47

Hardiness:

USDA Zone 4 515

Deciduous / Evergreen:

Deciduous 836

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. 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.

Ecological Functions:

Special Characteristics:

Fall Color 238

Patio Tree 128

Slow Growth Rate 271

Wet Soil Tolerant 109

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.