Ulmus thomasii
TAXONOMY
FamilyUlmaceae
GenusUlmus
Zone4
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Plants of the World OnlineABOUT
Ulmus thomasii, commonly known as Rock Elm or Cork Elm, is a species of elm native to North America. It is known for its hard, dense wood and distinctive corky ridges on its branches. This tree thrives in temperate climates and is typically found in well-drained soils. It has a dormancy period during the winter months.
ALSO KNOWN AS
Rock Elm
Ulmus racemosa
OVERVIEW
VPDCalculate
WaterMoist
SoilLoamy
LightDirect Bright (6 Hours)
Temperature15° C
Humidity60%
Dormancy4 Months
pH6.5
Pressure1,013 mbar
DETAILS
Care Instructions
Rock Elm requires bright, direct sunlight for optimal growth. It prefers moderate temperatures and can tolerate a range of humidity levels. Regular watering is necessary, but the soil should be allowed to dry out partially between waterings. This tree is best suited for outdoor environments.Soil
Rock Elm prefers well-drained loamy soil. It can tolerate a range of soil types but thrives best in nutrient-rich, slightly acidic to neutral soils. Good drainage is essential to prevent root rot.Fertilizer
A balanced fertilizer with an N-P-K ratio of 10-10-10 is recommended. Fertilize in early spring and again in mid-summer to support healthy growth.Repotting
Repotting is generally not necessary for Rock Elm as it is typically planted outdoors. However, if grown in a container, repotting should be done in early spring before new growth begins. Ensure the new container is large enough to accommodate the root system.Propagation
Propagation of Rock Elm can be done through seeds or cuttings. Seeds should be sown in the fall, while cuttings can be taken in late spring or early summer. Ensure the cuttings are kept in a humid environment until roots develop.Pruning
Pruning is essential to maintain the shape and health of the Rock Elm. Prune in late winter or early spring before new growth starts. Remove any dead, diseased, or crossing branches to promote healthy growth.Toxicity
Rock Elm is not known to be toxic to pets or humans. However, as with all plants, it is advisable to prevent pets and children from ingesting any part of the plant.Additional
Rock Elm is valued for its hard, durable wood, which is used in furniture making and other woodworking projects. It is also resistant to Dutch elm disease, making it a valuable species for reforestation and urban planting.REVOLUTIONIZE YOUR PLANT CARE
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