New Horizon Elm Ulmus 'New Horizon' (PBR)

Water

New Horizon Elm (Ulmus 'New Horizon') should be watered deeply once a week, ensuring that the water reaches the roots without waterlogging the soil. During the establishment phase which is typically the first couple of years after planting, it's crucial to maintain consistent moisture. As the tree matures, it becomes more drought-tolerant, but watering should increase to twice weekly during extended periods of heat or drought. Depending on the size of the tree and the weather conditions, newly planted trees may require 15-20 gallons of water each week. Adjustments should be made based on rainfall, with less water needed during wet periods and more during dry spells.

Light

New Horizon Elm thrives in full sun to partial shade. It's best to plant this tree in a spot where it will receive at least 6 hours of direct sunlight per day. They adapt well to a variety of lighting conditions but will have the most vigorous growth and best resistance to disease in full sunlight. Partial shaded areas are also acceptable, but avoid deep shade to ensure healthy development.

Temperature

New Horizon Elm is hardy and tolerant of a broad range of temperatures, but it performs best when the temperature ranges from 60°F to 85°F. It can withstand cold temperatures down to around -30°F and hot temperatures up to around 100°F. To ensure the best growth and vitality, protect the tree from extreme temperatures and winds, especially in areas with temperature fluctuations that could stress the plant.

Pruning

New Horizon Elm should be pruned to maintain its shape and remove any broken or diseased branches. The best time for pruning is late winter or early spring before new growth starts. Pruning while the tree is dormant will minimize stress and prevent the spread of disease. It is not necessary to prune every year, but regular inspection for damaged limbs should be part of the tree's care regimen. Removal of any branches that are crossing or rubbing against each other will help maintain tree health and appearance.

Cleaning

As needed

Soil

New Horizon Elm thrives in a well-drained loamy soil with a pH of 5.5 to 7.5. A mix of garden soil, compost, and sand or perlite is ideal to ensure drainage and fertility.

Repotting

For young New Horizon Elm trees, repot every 2 to 3 years; mature trees rarely need repotting but should be monitored for pot-bound conditions.

Humidity & Misting

New Horizon Elm is adaptable to various humidity levels, but moderate ambient humidity is ideal for optimal growth.

Suitable locations

• Indoor

  Place New Horizon Elm in well-lit area; ensure pot has good drainage.

• Outdoor

  Plant New Horizon Elm in full sun to partial shade with moist soil.

• Hardiness zone

  5-9 USDA

Life cycle

The life cycle of Ulmus 'New Horizon', commonly known as New Horizon elm, begins with seed germination, which occurs under the right conditions of warmth and moisture, although this cultivar is often propagated through cuttings or tissue culture due to its patented nature. After sprouting, the seedling goes through a juvenile phase where it develops its root system and initial foliage. As it matures into the vegetative stage, the elm experiences rapid growth, establishing a robust trunk and branching structure. Following this, it enters the reproductive phase, where it develops flowers that are wind-pollinated, leading to the production of seeds encapsulated in a papery samara. The elm reaches its mature phase with a full canopy and may live for several decades, contributing to its ecosystem by providing shade, habitat, and participating in the local carbon and nutrient cycles. Eventually, the elm enters a senescence stage, where growth slows and the tree may succumb to environmental stresses, pests, diseases, or natural aging processes, completing its life cycle.

Propogation

• Propogation time

  Spring-Early Summer

• The Ulmus 'New Horizon', commonly known as the 'New Horizon Elm', is often propagated through semi-hardwood cuttings, which is among the most popular methods for this variety. This procedure is generally carried out in late summer. Cuttings are taken from the current year's growth and typically measure 4 to 6 inches (about 10 to 15 centimeters) in length. The bottom leaves of the cutting are removed, and the cut end is often dipped in a rooting hormone to encourage root development. The cutting is then planted in a well-draining rooting medium and kept in a humid environment until roots establish, after which it can be transferred to a more permanent location. This approach is preferred for ensuring genetic consistency and achieving successful growth in new 'New Horizon Elm' trees.