Western Larch (Larix occidentalis)

Western Larch

Larix occidentalis

Its golden autumn foliage glows like sunlight through needles. Deciduous coniferous tree; common name: Western Larch.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Requires full sun for optimal growth; young trees tolerate partial shade but mature trees need unobstructed sunlight
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Watering Deep, infrequent watering; drought-tolerant once established, avoid waterlogged soil
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Temperature Extremely cold-hardy, withstands harsh winter temperatures; adapts to warm summer conditions in mountainous native regions
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Characteristics

  • Leaf: Soft, flat bright green needles (2–3 cm long) that turn golden yellow in autumn and drop annually
  • Cone: Small ovoid female cones (2–4 cm long) with woody scales; male cones are yellowish and clustered near branch tips
  • Stem/Bark: Mature bark is thick, furrowed, and reddish-brown; young stems are smooth and pale brown
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Care Guide

Watering

Deep water every 7–10 days during prolonged dry spells

Fertilization

Apply slow-release granular fertilizer once at bud break. Use a balanced conifer fertilizer to support needle growth

Crushed eggshell powder:Crush dried eggshells into fine powder; mix 1 cup of powder into the top 5 cm of soil in early spring to boost soil calcium levels
Pruning
  • Remove dead, damaged, or diseased branches in late winter before new growth emerges
  • Thin crowded lower branches to improve air circulation and reduce pest risk
  • Avoid heavy pruning, as larches have limited regrowth capacity on mature wood
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No known toxic effects to humans

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Garden Uses & Culture

Culture: N/A

Usage: Timber production for construction and wood products; ornamental landscaping for autumn color