Giant Sequoia (Sequoiadendron giganteum)

Giant Sequoia

Sequoiadendron giganteum

Its massive trunk holds millennia of forest memory, a monument to slow, steady growth. Evergreen coniferous tree; common names: Giant Sequoia, Sierra Redwood.

Full sun
1–2/week
Challenging
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Plant Needs

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Sunlight Full sun required for mature growth; young saplings tolerate partial shade to avoid sunscald
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Watering Deep, infrequent watering to encourage deep root development; drought-tolerant once established
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Temperature Cold-hardy to -20°C; withstands summer heat up to 35°C; protect young saplings from prolonged extreme frost
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Characteristics

  • Leaf: Scale-like, awl-shaped leaves 3–6 mm long, arranged in dense spirals on branchlets
  • Cone: Oval, woody cones 5–8 cm long, maturing after 18–20 months
  • Trunk: Thick, furrowed reddish-brown bark up to 60 cm thick for wildfire protection
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Care Guide

Watering

Deep watering every 1–2 weeks; moisten soil to 60–90 cm depth

Fertilization

Light application of balanced organic fertilizer once in early spring. Do not fertilize young saplings in their first 2–3 years to avoid stress

Composted banana peel tea:Steep fully composted banana peels in water for 3 days; dilute 1:20 for root drench; avoid raw peels to prevent pest attraction
Pruning
  • Remove dead or damaged lower branches to improve airflow around the trunk base
  • Avoid heavy pruning; only trim broken or diseased growth as needed to preserve natural form
  • Thin overcrowded upper branches in early spring to maintain structural integrity
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: No reported toxic effects on humans

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Garden Uses & Culture

Culture: Symbolizes longevity, strength, and environmental conservation in American public discourse

Usage: Ornamental landscape tree in large public parks; historically used for timber (now protected in most areas)