Swedish Columnar Aspen is characterized by its fastigiate or columnar growth habit, meaning it grows tall and narrow, almost like a column or a spire. Its form is quite distinctive and makes it an excellent choice for narrow spaces or as a vertical accent in the landscape. The leaves of the Swedish Columnar Aspen are similar to those of the trembling aspen, featuring a rounded shape with serrated edges. The leaves tremble or flutter in the slightest breeze, hence the name "trembling aspen."
The bark of young trees is smooth and greenish-gray, gradually becoming rougher and more furrowed with age.
- Size: Swedish Columnar Aspen typically reaches a height of 40 to 50 feet (12 to 15 meters) at maturity, although it may grow taller under optimal conditions. Its width is quite narrow, usually only about 8 to 8 feet (2.5m to 3m meters), making it ideal for tight spaces or as a vertical accent in the landscape.
- Sunlight: Like most aspen trees, the Swedish Columnar Aspen thrives in full sun to partial shade. It prefers at least six hours of direct sunlight per day for optimal growth.
- Soil: It adapts well to various soil types, including loamy, sandy, or clay soils, as long as the soil is well-draining. However, it prefers slightly acidic to neutral soil pH.
- Watering: Newly planted Swedish Columnar Aspen trees require regular watering to establish a strong root system. Once established, they are moderately drought-tolerant but will benefit from supplemental watering during prolonged dry periods, especially in hot climates.
- Pruning: Minimal pruning is required for Swedish Columnar Aspen, mainly to remove any dead, diseased, or damaged branches. It's important to prune selectively to maintain its columnar form.
- Fertilizing: Fertilize young trees annually in early spring with a balanced fertilizer to promote healthy growth. Once established, additional fertilization may not be necessary unless growth appears stunted or foliage shows signs of nutrient deficiencies.