Rock elm (Ulmus thomasii)

Rock elm

Once exported to England to build battleships, the rock elm, or Ulmus thomasii, is a deciduous tree with hardwood. It grows in one central trunk with serrated leaves. The wood of the rock elm is valuable.

Scientific classification

Species

Rock elm (Ulmus thomasii)

Roses, elms, figs, and allies

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Perennial

Lifespan

15 m to 30 m

Plant Height

8 m to 12 m

Spread

Green, Yellow

Leaf Color

Green

Flower Color

Winter dormancy

Dormancy

Deciduous

Leaf type

5 - 35 ℃

Ideal Temperature

Spring, Summer

Growth Season

Moderate

Growth Rate

Images of Rock elm

Attributes of Rock elm

Growth Rate

Moderate' growth of rock elm implies consistent development in height and expansion of foliage during Spring and Summer. This speed facilitates a balance between resources and growth, avoiding potential stress from rapid expansion. Notable phenomena include a gradual height increase, along with steady leaf production and robust wood formation. The evolution is discernible but subtle, indicating a focus on structural resilience rather than swift outward expansion.

Culture

Symbolism

Love. It is associated with shadows, darkness, and depression and was used to mark off tainted areas of the countryside.

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Care Guide for Rock elm

Every 3 weeks

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Water: Rock elm prefers moderate moisture levels found in temperate forests and tolerates slight dryness. Water every three weeks, allowing partial soil drying for healthy roots. Best grown outdoors in well-draining soil to prevent waterlogging, particularly in wetter climates.

Fertilize: For rock elm, apply balanced fertilizers in spring and fall, with high nitrogen during active growth every 3-4 weeks. Water before fertilizing to avoid root burn and adjust feeding seasonally, using slow-release options for consistent nutrients while minimizing runoff.

Pruning: Rock elm features a robust structure and durable wood. Pruning should occur in early spring, focusing on dead or diseased branches to encourage healthy growth. Minimal pruning preserves its natural shape, while regular assessments enhance longevity and improve resilience against pests and diseases.

Propagation: Rock elm features durable wood and is valued in landscaping. Propagation is successful via healthy, semi-hardwood cuttings from mature trees, treated with rooting hormone, and planted in well-draining soil. Maintain consistent moisture and indirect light until roots form, then transfer to larger pots or soil.

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