Guardian Columnar Aspen (Populus tremuloides 'Prairie Sky') is a striking deciduous tree renowned for its tall, narrow growth habit and vibrant green foliage that transforms into a golden-yellow hue in the fall. This cultivar is particularly prized for its slender, upright branches that create a columnar silhouette, making it an excellent choice for tight spaces or as a vertical accent in the landscape.

• Size: Height: Typically reaches 30 to 40 feet tall at maturity with only 8 to 10 feet wide, maintaining a slender profile ideal for small yards or urban environments.
• Sunlight: Guardian Columnar Aspen thrives in full sun to partial shade, requiring at least 6 hours of direct sunlight daily.
• Soil: It prefers well-draining soil with medium moisture content. However, it can adapt to a wide range of soil types, including clay and sandy soils.
• Watering: Provide regular watering, especially during the first few years of establishment. Once established, it is moderately drought-tolerant but benefits from supplemental watering during dry spells.
• Pruning: Minimal pruning is necessary beyond removing any dead or damaged branches. Avoid heavy pruning to maintain its natural columnar shape.
• Fertilizing: Apply a balanced fertilizer in early spring to promote healthy growth.
• Pest and Disease Control: Guardian Columnar Aspen is generally resistant to pests and diseases, but occasional pests like aphids or diseases like rust may occur. Monitor the tree regularly and address any issues promptly.
• Winter Care: Protect young trees from winter damage by wrapping the trunk with tree wrap and applying a layer of mulch around the base to insulate the roots.