Jacobsen's Columnar Japanese Larch

Jacobsen's Pyramid is a narrow, upright Japanese larch with soft green needles that turn gold-yellow to orange before dropping in fall. [Oregon State University’s plant profile](https://landscapeplants.oregonstate.edu/plants/larix-kaempferi-jacobsens-pyramid) describes this named selection as columnar and reports that it may reach about 12 feet tall and 8 feet wide in ten years. ## Form and seasonal interest The cultivar is listed as *Larix kaempferi* 'Jacobsen's Pyramid'; Oregon State notes that Arne Jacobsen of Denmark discovered and introduced it. Its upright outline gives a garden or conifer planting vertical form, while the seasonal needle color brings a bright autumn display. The university's ten-year size figure describes growth over that period, not a promise of final lifetime dimensions. ## Planting Choose a site in full sun with sufficient moisture and well-drained soil. The parent species is hardy to USDA Zone 4, according to Oregon State's profile. Allow room for the narrow crown as it develops and avoid planting where falling needles will routinely obstruct drains. ## Maintenance Water during establishment and through extended dry periods, keeping the root zone evenly moist without leaving it waterlogged. Let the tree shed its needles naturally in fall; remove dead or damaged branches when needed and avoid shearing its columnar outline.