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Photo: Pnapora (CC BY-SA 3.0)
Cis Bolko (the Bolko Yew)
Photo: Pnapora (CC BY-SA 3.0)See it at full size

Cis Bolko (the Bolko Yew)

Książ, Wałbrzych

Years old400-800
Girth2.92 m
SpeciesEuropean Yew

The naturalist Alexander von Humboldt put this yew at more than 800 years old, and nobody since has managed to confirm or disprove him. The current official estimate is about 600 years. Other sources say 700 or more. The honest answer is somewhere between 400 and 800, a range wide enough to swallow four centuries of Silesian history. Yews are difficult to date. They hollow from the middle outwards, lose their heartwood and stop keeping a countable record of themselves, which is why the arguments about them never quite end. This one measures 292 centimetres round, about three metres, and is probably the oldest yew in the Sudetes. It is not in good condition, and there is no reason to pretend otherwise. The trunk is badly damaged, the crown is thin and poorly developed, and the tree now stands inside a wooden fence with metal scaffolding carrying part of its weight. It is alive, and it is alive because people decided it would be. Formal protection dates from either November 2006 or August 2008, depending on which record you read, though both describe the same listing. The tree stands beside the Pełcznica stream gorge in the Książ Landscape Park, on the green trail and the Hochberg path, reachable on bus 8 from Wałbrzych or on foot down from Książ castle. There is an information plaque at the foot of it, and for a tree this contested it is remarkably confident.

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Getting there

Książański Park Krajobrazowy, near the Pełcznica stream gorge, forest district 12h, near Zamek Książ

You can recognise it by its badly damaged trunk and thin crown, standing inside a wooden fence with metal scaffolding carrying part of its weight. It stands beside the Pelcznica stream gorge in Ksiaz Landscape Park.

Free, publicly accessible within the Książ Landscape Park (Książański Park Krajobrazowy). Stands beside the Pełcznica stream gorge on marked hiking trails (the green trail and the Hochberg path), with an information plaque at the site. Reachable by bus line 8 from Wałbrzych or Szczawno-Zdrój, or on foot from Książ castle.

Bus line 8 from Wałbrzych or Szczawno-Zdrój to the park, then a marked trail walk to the tree.

The tree's yearIn fruit
now JanFebMarAprMayJunJulAugSepOctNovDec

In fruit

September to November: red arils on female trees, the only part that is not poisonous

The line is our estimate of how much there is to see, not a measurement. Typical for this species where this tree stands; exact weeks shift with the year.

Sources

Where the facts on this page come from. The story was written with AI from these sources, and readers who know the tree correct it.

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Cis Bolko (the Bolko Yew)

For example: “Best seen from the north side around four, when the sun comes through.” Or: “There was a church on this square until 1755.”

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