Iseli Columnar Bosnian Pine

Iseli Fastigiate is a named Bosnian pine selection with long dark green needles and a narrow, upright outline. Its plant-specific listing gives mature dimensions of 15–20 feet high by 8–10 feet wide, which provides a practical mature-size guide. ## Landscape Use Use this evergreen as a vertical specimen or narrow screen. The [plant-specific listing](https://www.gardencentermarketing.com/plantName/Pinus-heldreichii-Iseli-Fastigiate) identifies the selection as Pinus heldreichii, also treated under Pinus leucodermis, describes dark green needles, gives 15–20-foot height, 8–10-foot width, and USDA Zones 5–9. An [American Conifer Society publication](https://duz1zqzp328bb.cloudfront.net/coniferquarterly/winter-2004/Winter-2004.pdf) records Iseli Nursery’s introduction of the seed-raised selection in 1985. The supplied developer reference identifies Iseli Nursery as the matching developer. ## Growing Conditions Choose a well-drained site with enough sun to maintain a dense crown, leaving clearance for the documented spread. The fastigiate habit is narrower than many broad pines, but its mature width still calls for room in a residential planting. ## Maintenance Water consistently during establishment and prolonged dry weather. Inspect periodically for damaged or crossing branches and prune selectively to preserve the naturally upright outline.