Five natural monuments, spread across three of Cologne's green spaces rather than the cathedral everyone photographs. The Flora botanical garden holds a wingnut with fourteen trunks from one base. A hospital park in Lindenthal, older than the hospital by a century, keeps the city's thickest measured trunk, a plane 5.30 metres round, and an oak nearby. The Volksgarten's Turkey oak was likely one of four hundred mature trees moved in to make the park look old on opening day, 1889. None of the five has a documented age yet, an honest gap this page asks readers to help close.
0 of 5 visited in Cologne
1
The Fourteen-Trunked Caucasian Wingnut
Caucasian Wingnut (Pterocarya fraxinifolia) · Riehl
The Great Wingnut of the Flora sends up fourteen trunks from a single base, which is not how Caucasian wingnuts usually grow. Most stay to one, or split into a modest two or three; this one has been suckering and re-rooting into a thicket for long enough that Cologne's own natural-monument register lists it as a single designated tree with fourteen daughter stems.
It stands in the Flora, the city's botanical garden in Riehl, opened in 1864 on the ground the old botanical garden gave up when the main railway station needed the space nearer the cathedral. Wingnuts and ginkgos were among the species planted when the garden was new, which puts this tree's species on site since the founding, though nothing on record says this exact multi-trunked specimen is that old rather than a later addition. A second, single-trunked Caucasian wingnut is registered nearby, so look for the fourteen trunks rather than the species alone.
No girth or age has been recorded against it, an honest gap rather than an oversight: a tape measure around any one of the fourteen trunks would be a start. The garden is free and open daily until dusk, tram to Zoo/Flora and a short walk in.
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2
The Great Plane of Hohenlind Park
London Plane (Platanus x acerifolia) · Lindenthal
The biggest-girthed tree found in this pass of Cologne stands in a hospital car park, more or less. St. Elisabeth-Krankenhaus Koln-Hohenlind was built in 1927 into a park that already existed, and the park is older than anyone at the hospital: a country estate stood here with its own grounds from around 1850, and a 1932 account already called the planting roughly 150 years old by then, putting parts of it back into the late eighteenth century.
The plane that survived all of it measures 5.30 metres round, measured by the city in 2018 and easily the thickest trunk this pass turned up anywhere in Cologne. It shares the grounds with a second, smaller plane and a pedunculate oak about a hundred metres away, all three separately designated natural monuments on the same old estate.
What looks like private hospital land is not: both the hospital's own materials and independent sources state plainly that the green space stays open to the public during the day, the grounds rather than the building. No age is recorded for the tree itself, only for the park around it, so treat the girth as the honest measure and the century estimate as a description of the ground it grows on, not a birth certificate.
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3
The Hohenlind Oak
Pedunculate Oak (Quercus robur) · Lindenthal
A hundred metres from the big plane in the Hohenlind hospital park stands a pedunculate oak, 3.75 metres round, on the same patch of former estate ground that predates the hospital by the better part of a century.
The two trees make one short walk rather than two separate trips, both listed as natural monuments in Cologne's own designation register and both measured by the city on the same day in May 2018. The oak has no recorded age of its own, but the estate around it was already reckoned about 150 years old in a 1932 account, which puts at least some of its planting into the late 1700s, a fact about the park rather than a dated certificate for this particular trunk.
A third registered tree, a second plane, stands nearby too, though without a published girth or coordinate to go with it, which is why it stays a lead rather than a fourth stop on this walk.
The park belongs to St. Elisabeth-Krankenhaus, a hospital, and both the hospital and independent sources confirm the grounds stay open to the public in daytime hours. The building is not part of the visit; the trees around it are.
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4
The Turkey Oak of the Volksgarten
Turkey Oak (Quercus cerris) · Neustadt-Sued
Cologne's Volksgarten opened in 1889 with a shortcut nobody does anymore: its designer transplanted roughly four hundred already-mature trees in from other woodland so the new park would look established from its first season rather than take fifty years to grow into itself.
The Turkey oak by the lakeside restaurant was very likely one of the exotic accents chosen for that opening planting, set deliberately near the water where visitors would pass it. Turkey oak is an uncommon choice for a Rhineland park, native further south and east, which is presumably why it was picked to stand out rather than blend in. No source ties this individual tree to the 1889 planting by name, so treat the connection as circumstantial rather than dated fact, and no girth or age has been measured against it in the city's own register.
It keeps company nearby with a small group of Japanese pagoda trees at the park entrance and a swamp cypress at the pond's far edge, both worth finding on the same visit even though neither has cleared this pass's evidence bar yet.
The Volksgarten is one of Cologne's main city parks, free and open, reachable from Chlodwigplatz or Ubierring.
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5
The Moltke Lime of the Kahnweiher
Moltke Lime (Tilia x moltkei) · Lindenthal
Most of the Koelner Stadtwald is younger than it looks. The park was laid out from 1895 onward as a purpose-built recreation ground, and its own history notes that most of what grows there today is under eighty years old, ordinary planting for a public forest of that age.
The Moltke lime by the Kahnweiher, the park's rowing pond, is one of the exceptions: a comparatively uncommon large-leaved lime hybrid old enough to have earned individual protection as a city natural monument, standing where the Stadtwald's own account says older tree stock was folded in from estates that predated the park itself. Nothing on record gives this specific tree a planting date, so its age stays an honest gap rather than a guess, and the case for its age rests on inference about the ground rather than a measurement of the trunk.
Two registered copper beeches grow at the same spot, close enough to make this corner of the Stadtwald a small three-tree cluster rather than a single stop. Existence here rests on the city's own designation register alone. Nothing contradicts it, and the register has been reliable everywhere else in this city, but it is the thinnest-evidenced of Cologne's trees so far.
The Stadtwald is public land, free and open at all times, a walk of about 1.5 kilometres from the Hohenlind trees.
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