Species American elm

American elm

Ulmus americana 'Jefferson'

The American elm (Ulmus americana ‘Jefferson’) is a deciduous tree that grows up to 80 feet tall and is known for its upright vase-like shape. Its broad-oval to elliptic-ovate, dark green, two- to four-lobed leaves turn bright yellow in autumn. The bark is light gray and furrowed with age. It is a popular shade and ornamental tree and is very tolerant of urban conditions. It is resistant to Dutch elm disease and tolerant of wet soils. With its hardy characteristics it is ideal for windbreaks and lawns.

Cycle:

Perennial

Watering:

Average

Propagation:

Air Layering Propagation,Grafting Propagation,Cutting,Seed Propagation

Hardiness Zone:

2 - 9

Flowers:

Reddish-green Flowers In Spring

Sun:

Full sun

Soil:

Sandy Loamy Clay Rocky

Fruits:

green Fruits In Spring Ready In Fall

Leaf:

Yes

Leaf Color:

green

Growth Rate:

High

Maintenance:

Moderate

Drought Tolerant:

Yes

Care Level:

Moderate

watering

American Elm can generally be watered deeply every week to 10 days, depending on the amount of rainfall and temperature. In periods of high heat and dryness it may need to be watered more often. When watering, make sure to deeply soak the soil until water runs out of the drainage holes in the pot. To know if the soil is adequately saturated, wait until the surface of the soil appears dry before irrigating again.

sunlight

American elm (Ulmus americana 'Jefferson') does best with direct sunlight for 6-8 hours per day, usually in the morning hours. It grows best in full sun, so it is important to place it in an area that gets sunlight for most of the day. This species of elm tree has a high tolerance for drought and heat, so its exposure to direct sunlight is beneficial to its health. For optimal growth, it’s best to provide direct sunlight for American elm during the warmest part of the day, when the temperatures are between 60-85 degrees Fahrenheit.

pruning

American elm (Ulmus americana 'Jefferson') trees should generally be pruned in late winter, when the tree is still dormant. Begin pruning the elm by removing any crossing branches, dead wood, and suckers. If the tree has multiple trunks, be sure to select the strongest and healthiest as the leader. Once this is done, proceed to thin the tree’s canopy by light pruning. Take out any branches that are competing with each other, as well as any that interfere with the structure’s integrity. This will help the tree to become stronger and healthier. Finally, prune away any dead or damaged branches, and shorten excess growth. Be sure to keep all pruning cuts clean and sharp. Pruned trees should be supported with stakes or cables to prevent them from breaking or splitting.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Harvest Fruit

The best time to start harvesting the fruits from the species Ulmus americana 'Jefferson' is in the months of September and October.

Starts Flowering

American elm typically starts flowering in April.

Hardiness Map