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Arnold Sentinel Austrian PinePinus nigra 'Arnold Sentinel'
Height: 6-8 m
Width: 1-2 m
Zone: 3
Exposure: Sun to part shade
Narrow evergreen with sharply ascending branches, producing a columnar shape. Needles are dark-green, stiff and in bundles of 2. Perfect specimen in a smaller landscape or for narrow screening. Low maintenance and slow growing.
As with most pines, this unusual plant grows best in a well-drained soil. If necessary, pinching the candles in mid-spring will encourage a more compact form. To improve looks and airflow, these plants would benefit from periodic 'combing' (use your fingers) to remove dead material.