Sitka Spruce (Picea sitchensis)

Sitka Spruce

Picea sitchensis

Its towering form carves coastal skies with evergreen grace. Large coniferous tree; common name: Sitka spruce.

Full sun
1–2/week
Moderate
🌱

Plant Needs

☀️
Sunlight Full sun to partial shade; tolerates strong coastal wind exposure
💧
Watering Water deeply for young saplings; mature trees require minimal supplemental watering
🌡️
Temperature Hardy to -20°C; thrives in cool coastal temperatures, avoid prolonged extreme heat above 25°C
🔍

Characteristics

  • Leaf: Flat, sharp-pointed needles, blue-green to silvery, arranged spirally on stems
  • Cone: Pendulous, reddish-brown when mature, 5–10 cm long
  • Bark: Thin, scaly, gray-brown when young, becoming furrowed with age
🛠️

Care Guide

Watering

Water young trees weekly; mature trees only during prolonged drought periods

Fertilization

Slow-release granular feed once in early spring. Use a balanced, slow-release fertilizer formulated for coniferous trees

Eggshell powder top-dress:Crush dried eggshells into fine powder; lightly mix into topsoil around young saplings to boost calcium levels
Pruning
  • Remove dead or damaged branches in late winter to prevent disease spread
  • Thin lower branches for ground clearance; avoid heavy pruning of mature trees
  • Shape young saplings in early spring to encourage a narrow conical form
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic; no risk of poisoning for cats

Humans: Non-toxic to humans; no known adverse effects from ingestion or contact

📖

Garden Uses & Culture

Culture: N/A

Usage: Timber production, reforestation, coastal windbreak, ornamental landscape tree