Elm (Ulmus ‘Morton’ ACCOLADE)

Plant: Table of Contents

Plant Scientist’s Guide to Elm (Ulmus ‘Morton’ ACCOLADE)

Elm (Ulmus ‘Morton’ ACCOLADE) is a hybrid variety of elm tree that has gained popularity in landscaping due to its attractive features and adaptability. In this comprehensive guide, we will explore the key characteristics, cultivation requirements, uses, and maintenance tips for the elm (Ulmus ‘Morton’ ACCOLADE) tree. Whether you are a landscape designer, a homeowner, or a botany enthusiast, this guide will provide valuable insights into maximizing the potential of this elegant tree in various settings.

What is Elm (Ulmus ‘Morton’ ACCOLADE)?

Elm (Ulmus ‘Morton’ ACCOLADE) is a cultivar of a hybrid elm variety known for its exceptional attributes. With its distinct characteristics and adaptability, this tree has become a popular choice for landscaping projects, adding aesthetic appeal and providing environmental benefits.

Key Takeaways – Elm (Ulmus ‘Morton’ ACCOLADE)

  • Scientific Name: Ulmus ‘Morton’ ACCOLADE
  • Common Name: Elm
  • Variety: Hybrid Elm
  • Cultivar: ACCOLADE
  • Hybridizer: Dr. Alden Townsend, Morton Arboretum, Lisle, Illinois, USA
  • Year of Introduction: 1983
  • Growth Habit: Deciduous tree with an upright, vase-shaped canopy


In the realm of plant science, understanding the cultural requirements of a specific plant is crucial for its successful growth and development. Let’s delve into the cultural aspects of cultivating the elm (Ulmus ‘Morton’ ACCOLADE) tree.


The elm (Ulmus ‘Morton’ ACCOLADE) tree is valued for its versatile uses in landscaping and urban forestry. Some of its primary applications include:

  • Shade Tree: The broad canopy of the elm provides ample shade, making it an excellent choice for parks, residential yards, and urban landscapes.
  • Ornamental Feature: Its attractive foliage and distinctive form make the elm (Ulmus ‘Morton’ ACCOLADE) a popular ornamental tree in gardens and public spaces.
  • Wildlife Habitat: The tree supports wildlife by providing nesting sites for birds and habitats for various insects.


Proper watering is critical for the health and vigor of elm (Ulmus ‘Morton’ ACCOLADE) trees, especially during the establishment phase and dry periods. Consider the following watering guidelines:

  • Establishment Phase: Newly planted elms should receive regular watering to promote root establishment. Provide approximately 1-2 inches of water per week, either through rainfall or irrigation.
  • Mature Trees: Once established, elm trees generally have moderate water requirements. Deep watering every 7-10 days during dry spells is advisable, ensuring that the water penetrates the root zone.


Elm (Ulmus ‘Morton’ ACCOLADE) trees thrive in locations with ample sunlight, although they can tolerate partial shade. When selecting a planting site, consider the following sunlight requirements:

  • Full Sun: Ideally, plant the elm in a location that receives at least 6 hours of direct sunlight daily for optimal growth and foliage density.
  • Partial Shade: While tolerant of partial shade, reduced sunlight exposure may lead to slightly sparse foliage and slower growth rates.


Proper fertilization can enhance the growth and overall health of elm (Ulmus ‘Morton’ ACCOLADE) trees. Consider the following fertilizer recommendations for this cultivar:

  • Timing: Apply a balanced, slow-release fertilizer in early spring, just before the tree enters the active growing season.
  • Application Rate: Follow the manufacturer’s instructions for the specific fertilizer product used, and avoid excessive application to prevent nutrient imbalances and potential burn.


Understanding the soil preferences of elm (Ulmus ‘Morton’ ACCOLADE) trees is essential for successful cultivation. Here are the key considerations related to soil:

  • Well-Drained Soil: Elm trees prefer well-drained, loamy soil that provides good aeration for the roots and prevents waterlogging.
  • Soil pH: The ideal soil pH range for elms is slightly acidic to neutral (pH 6.0-7.5). Conduct a soil test to assess the pH and nutrient levels, and amend the soil as needed.


Pruning is an essential aspect of elm tree care, promoting structural integrity, aesthetics, and overall tree health. Follow these pruning guidelines for the elm (Ulmus ‘Morton’ ACCOLADE):

  • Pruning Time: Perform major pruning tasks, such as crown reduction or shaping, during the dormant season in late winter or early spring to minimize stress on the tree.
  • Pruning Techniques: Employ proper pruning techniques to remove dead or damaged branches, maintain a balanced canopy, and address any structural issues. Avoid excessive pruning, especially during the growing season.


While propagation of elm (Ulmus ‘Morton’ ACCOLADE) trees is primarily achieved through grafting and budding techniques in commercial nurseries, it is possible to propagate these trees from seeds. Keep in mind the following considerations:

  • Seed Collection: Harvest seeds from mature elm trees in the fall when they are fully developed and ripe.
  • Seed Germination: Stratify the seeds in a moistened, sterile medium at cool temperatures for a designated period before sowing them in the desired location.

Container Popularity

Elm (Ulmus ‘Morton’ ACCOLADE) trees, with their striking appearance and adaptability, are increasingly popular for container planting in urban and commercial settings. Choose containers that accommodate the tree’s root system and provide adequate drainage for successful growth.

Container Common Diseases

Elm (Ulmus ‘Morton’ ACCOLADE) trees in containers may be susceptible to specific diseases due to environmental stress and limited root space. Some common diseases to watch for include:

  • Root Rot: Excessive soil moisture and poor drainage in containers can lead to root rot, causing wilting and decline in the tree’s health.
  • Powdery Mildew: Lack of airflow in container plantings may contribute to powdery mildew infections, which manifest as white, powdery growth on the foliage.

Disease Diagnosis

In the event of suspected diseases impacting elm (Ulmus ‘Morton’ ACCOLADE) trees, accurate diagnosis is crucial for implementing appropriate management strategies. Consult with a certified arborist or plant pathologist to accurately identify the causal agent and determine the best course of action.

Common Pests

Elm (Ulmus ‘Morton’ ACCOLADE) trees may be vulnerable to various pests, including aphids, scale insects, and caterpillars. Regular monitoring of the tree’s foliage and bark can help detect pest infestations early, enabling prompt and targeted interventions.

Botanist’s Tips

Consider the following tips and recommendations from botanists and plant experts for successfully cultivating and caring for elm (Ulmus ‘Morton’ ACCOLADE) trees:

  • Species Selection: When choosing elm tree varieties for a specific landscape, consider the growth habit, size, and environmental adaptability of Ulmus ‘Morton’ ACCOLADE to ensure suitability.
  • Pruning Best Practices: Adhere to proper pruning techniques and timing to maintain the structural integrity and aesthetic appeal of the elm tree while promoting its long-term health.
  • Disease Resistance: Seek disease-resistant cultivars such as Ulmus ‘Morton’ ACCOLADE to minimize the risk of devastating diseases, such as Dutch elm disease, which has historically affected elm populations.

Fun Facts

  • The hybrid variety Ulmus ‘Morton’ ACCOLADE was developed through controlled crossbreeding to incorporate desirable traits from different elm species, resulting in an exceptional ornamental tree with enhanced attributes.
  • Elm trees, including the ACCOLADE cultivar, have historical significance and cultural value, often featured in literature, art, and urban landscapes around the world.

Links to External Resources

For further information and resources on Elm (Ulmus ‘Morton’ ACCOLADE) trees, explore the following reputable sources:


In the realm of plant science and landscaping, elm (Ulmus ‘Morton’ ACCOLADE) trees hold a special place due to their exceptional features, adaptability, and aesthetic appeal. By understanding and implementing the cultivation guidelines and maintenance practices outlined in this comprehensive guide, individuals and professionals can harness the full potential of these beautiful and valuable trees in various settings, contributing to urban greening and environmental enhancement.

Remember that the engaging journey of cultivating and caring for elm (Ulmus ‘Morton’ ACCOLADE) trees is not only rewarding but also contributes to the preservation of a timeless tree lineage.

Thank you for reading and happy planting!

Disclaimer: The information provided in this guide is for educational purposes and does not substitute professional horticultural or arboricultural advice. Always consult with certified professionals for personalized guidance on tree care and maintenance.

Picture of Peter Taylors

Peter Taylors

Expert botanist who loves plants. His expertise spans taxonomy, plant ecology, and ethnobotany. An advocate for plant conservation, he mentors and educates future botanists, leaving a lasting impact on the field.