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 10 to 15 feet (3 to 4.5 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.