Japanese elm (Ulmus davidiana)

Also known as: David Elm, Japanese Elm

The tree can reach a height of up to 15 meters and typically has a slender trunk with a diameter of less than 30 cm. Its leaves are obovate to obovate-elliptic, measuring less than 10 cm in length and 5 cm in width, with a rough texture on the upper side, often appearing dark red when they first emerge. The tree produces wind-pollinated, apetalous flowers on shoots from the previous year during spring, which are followed by obovate samaras that are less than 1.9 cm long and 1.3 cm wide.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Japanese elm

Lifespan

Perennial

Plant Type

Tree, Shrub

Plant Height

15 m

Spread

10-15 meters

Leaf Color

Dark green

Flower Size

1.4 cm

Flower Color

Greenish

Images of Japanese elm

Quickly Identify Japanese elm

Ulmus davidiana can be recognized by its oblong to ovate leaves with serrated edges, creating a distinct lace-like pattern. The bark is grey-brown, rough, and furrowed, often with diamond-shaped ridges. In spring, small greenish flowers appear before the leaves.

Scientific Classification of Japanese elm

Phylum

Vascular plants

Class

Dicotyledons

Order

Rosales

Family

Elm

Genus

Elms

Species

Japanese elm

Planting and Growing of Japanese elm

Care Difficulty

Moderate

Watering Schedule

Every 2 days

Sunlight Requirements

Full sun

Sunshine Duration

4-10 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

Once a year

Repotting Season

Spring

Pot Type

Plastic, Terracotta

How to Water Japanese elm?

For Ulmus davidiana, ensure the soil receives about 500 ml of water each session. The key is to moisturize the soil subtly, neither saturating it nor leaving it parched. Water until the soil feels evenly moist but not soggy.

What are the symptoms of an underwatered Japanese elm? ›

What should I do if my Japanese elm is not getting enough water? ›

What are the symptoms of an overwatered Japanese elm? ›

How to save an overwatered Japanese elm? ›

What Are the Sunlight Requirements for Japanese elm?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours daily

Ulmus davidiana excels in full to partial sun, which promotes strong growth and a lush canopy. Adequate light ensures effective photosynthesis and resilience against environmental stresses.

What is the ideal sunlight exposure for Ulmus davidiana? ›

How to achieve ideal light exposure for Ulmus davidiana? ›

What benefits does ideal light offer to Ulmus davidiana? ›

What Is the Ideal Temperature Range for Japanese elm?

Ideal Temperature: 60 ~ 75℉

Ulmus davidiana thrives best in temperatures ranging from 60°F to 75°F. This range supports optimal growth and health, ensuring that the plant performs photosynthesis efficiently and maintains a robust structure.

What Soil is Best for Japanese elm?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Ulmus davidiana requires well-drained soil to thrive because it prevents waterlogging and root rot, ensuring consistent access to nutrients and oxygen for healthy growth. The tree benefits greatly from nutrient-rich soil, which supports its rapid growth and vibrant foliage by providing essential minerals and organic matter. Maintaining moderate moisture levels in the soil is crucial to keep the tree hydrated while avoiding excessive dampness that could lead to fungal issues.

How to Fertilize Japanese elm?

Fertilizer type: Balanced

For Ulmus davidiana, the fertilizer amount depends on the tree's age and size. Young trees may require up to 0.5 kg of fertilizer per application, while mature trees might need up to 1 kg. This helps ensure the tree receives an adequate supply of nutrients necessary for robust growth. Equally distributing the fertilizer around the root zone allows the nutrients to reach the plant effectively.

How to Prune Japanese elm?

Pruning Time: Spring, Summer

Begin by cutting away dead, broken, or diseased branches. These are usually the first to go as they can affect the tree’s health. Focus on shaping the canopy to ensure light and air can penetrate the leaves. A balanced structure will help prevent future breakage. Preserve a single leader branch to maintain the hierarchy of growth, supporting a strong and dominant structure. Eliminate branches that cross or rub against each other, as this can cause wounds and lead to disease. More About Pruning Techniques→

How to Propagate Japanese elm plant?

Propagate Time: Spring,Late spring,Early summer

Choose healthy branches and cut segments about 6-8 inches long. Ensure each segment has at least two leaf nodes, as these are crucial for rooting.

Dip the cut end of each cutting into a rooting hormone. This will encourage root growth and enhance the likelihood of successful propagation.

Insert the treated end of the cuttings into a well-draining potting mix, ensuring that at least one node is below the soil surface. Firm the soil gently around the cutting to secure it in place.

More About Propagating Techniques→

How to Repot Japanese elm plant?

Repotting frequency: Every 2-3 years

Repot Ulmus davidiana when its roots become crowded or start circling. You'll notice this by roots emerging from drainage holes or a visible lack of soil at the top. Early signs of yellowing leaves can also indicate it's time for a new pot.

Select a pot slightly larger than the current one to provide room for growth. Ensure it has sufficient drainage holes to prevent waterlogging, which can lead to root rot. A terracotta pot helps to wick moisture away, keeping the roots healthy.

Opt for a well-draining loamy soil mix with good nutrient-holding capacity. This type of soil retains adequate moisture while preventing soggy conditions. Adding organic matter enhances its texture and provides necessary nutrients for robust plant health.