Also known as Common Hemlock · Hemlock Spruce · Pacific Hemlock
Western Hemlock (Tsuga heterophylla) is a stately coniferous evergreen tree native to western North America, known for its graceful, drooping branches and soft, flat need
At-a-glance light, water, soil, and growing conditions from plant data
Partial to full shade
50% intensity
Prefers dappled sunlight or shade, especially protection from harsh afternoon sun. Young trees are more sensitive.
Consistent moisture, avoid saturation
75% intensity
Keep soil evenly moist, especially during dry spells. Good drainage is crucial.
Loam, Clay, Sand
50% intensity
Cool to moderate
50% intensity
Prefers cooler climates. Tolerates light frosts but is sensitive to extreme heat and drought.
Minimal
25% intensity
Only fertilize if growth is poor, using a balanced, slow-release fertilizer in early spring.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Non-toxic
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Western Hemlock prefers consistently moist soil but dislikes waterlogging. Water deeply when the top 2-5 cm of soil feels dry. In hotter, drier periods, increase watering frequency.
Ensure good drainage to prevent root rot, especially for young or container-grown trees.
Pruning is primarily done to remove dead, damaged, or crossing branches. For aesthetic shaping, light pruning can be done in late winter or early spring before new growth begins.
Avoid heavy pruning, as Tsuga heterophylla can be slow to recover.
Propagation is typically done from seeds sown in autumn and stratified outdoors over winter, or by semi-hardwood cuttings taken in summer and treated with rooting hormone. Grafting can also be used for specific cultivars.
Container-grown Western Hemlocks benefit from repotting every 2-3 years. Repot in early spring before new growth emerges. Use a well-draining potting mix.
Choose a pot that is only slightly larger than the current one to avoid overwatering issues.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Western Hemlock (Tsuga heterophylla)
Where Western Hemlock (Tsuga heterophylla) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Pinopsida |
| Order | Pinales |
| Family | Pinaceae |
| Genus | Tsuga |
| Species | Tsuga heterophylla |
Similar in genus Tsuga
Answers based on plant encyclopedia data
