Taxus brevifolia

Pacific Yew Care & Identification Guide

Q: Is the Pacific Yew safe for household pets?

No, all Taxus species are extremely toxic and potentially fatal to dogs, cats, horses, and livestock due to Taxine alkaloids that cause rapid heart failure.

The magnificent Pacific Yew (Taxus brevifolia), also known as the Western Yew, is a highly spectacular evergreen conifer native to the Pacific Northwest, celebrated globally for its slow growth rate, historic medicinal value, and striking red arils. Its bark contains the powerful anti-cancer drug Taxol. It features flat, dark green needle-like leaves arranged in two rows. Critical Warning: The entire tree, especially the seeds, needles, and bark, is highly toxic to mammals, containing lethal Taxine alkaloids that cause cardiac arrest. It requires moist organic loam, part shade, and moderate watering.

Sunlight Part Shade to Full Shade

Watering Moderate

Soil Mix Moist Organic Loam

Temperature -25°C to 25°C

Toxicity Toxic

Botanical photography of Pacific Yew (Taxus brevifolia) - Plant AI care database

How to Identify Pacific Yew

Identify Pacific Yew immediately by its highly distinct biological features. Native to its specific ecosystem, it showcases spectacular foliage and structural habits optimized for its environment.

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Distinctive Features: Flat, dark green needles in two flat rows, bright red fleshy cup-shaped aril berries enclosing a dark seed, and thin reddish-purple papery bark.
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Typical Coloration: Dark green needle foliage, paper-thin reddish-purple bark, and bright scarlet-red fleshy arils.
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Potential Confusions: Similar to Coast Redwood in leaf structure, but instantly distinguished by its fleshy red arils instead of dry woody cones.

11-Step Professional Care & Planting Guide

💧 【Watering & Moisture】 Water moderately. Prefers consistently moist, cool, well-drained soil. Highly sensitive to drying out; irrigate deeply once a week during dry summers.

☀️ 【Sunlight & Exposure】 Requires partial shade to full shade. Unlike most conifers, it thrives in deep forest understories; intense direct midday sun will scorch the needles.

🪴 【Ideal Soil Mix】 Requires deep, rich, moist, organic-rich well-draining soil. Blend 50% organic loam, 30% organic peat moss, and 20% compost (pH 5.5-6.8).

🌡️ 【Temperature & Winter Care】 Cold-hardy (USDA Zone 5-9). Thrives in cool, humid, mild maritime mountain climates. Protect from dry, freezing winter winds.

✂ 【Pruning & Grooming】 Minimal pruning required. Highly tolerant of pruning (historically used for topiary). Prune lightly in late spring to shape.

🧪 【Fertilization】 Feed once in early spring with a slow-release organic balanced fertilizer. Mulch deeply with composted leaf mold.

🏺 【Potting & Garden Planting】 Plant under larger shade trees. Dig a wide hole twice the root ball, backfill with rich organic loam, and mulch deeply.

🌱 【Propagation】 Propagated by taking semi-hardwood cuttings in late summer, or by seeds which require a complex warm-cold stratification over 1-2 years.

🐛 【Common Pests】 Generally highly resistant. Watch occasionally for scale insects or black vine weevils. Spray manually with neem oil.

🦠 【Common Diseases】 Susceptible to root rot in waterlogged clay. Outstanding soil drainage and rich organic loam are essential.

🎓 【Botanist Advice】 Extremely critical safety warning: The needles, bark, and seeds contain the toxic alkaloid Taxine, which is highly poisonous to dogs, cats, horses, and humans! Even a tiny amount can cause rapid cardiac arrest. Only the red fleshy aril cup is non-toxic, but the seed inside is deadly.

Frequently Asked Questions

What is Taxol and how is it related to Yew?

It is a medical miracle! Taxol is a powerful anti-cancer drug discovered in the bark of the Pacific Yew (Taxus brevifolia). It works by stopping cancer cells from dividing, saving millions of lives.

Are the red yew berries toxic?

Yes! The bright red, fleshy, cup-shaped outer part (the aril) is the only non-toxic part of the tree. However, the hard seed nestled inside the aril is extremely deadly and must never be chewed or swallowed.

Is the Pacific Yew safe for household pets?

No, all Taxus species are extremely toxic and potentially fatal to dogs, cats, horses, and livestock due to Taxine alkaloids that cause rapid heart failure.

Does it grow well in full sun?

No, it is a true understory conifer that prefers partial to full shade. Planting it in intense, scorching direct sun will cause foliage burn and severe stress.