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The thickest, tallest, and oldest trees in Ireland

By province

Girth

In this table of girth records in Ireland only girth measurements made at a height between 1.30 m and 1.50 m are listed. Trees with multiple trunks are excluded.
Of course this inventory contains only tree records as far as they are registered on this site.

How to measure the girth of a tree?

NrTree speciesGirthLocationMeasurementYear
1Sequoiadendron giganteum (Giant sequoia)9.95 mPowerscourt House & Gardens, Enniskerry, Leinster Leo Goudzwaard2014
2Cupressus macrocarpa (Monterey cypress)9.90 mClontra House, Shankill, LeinsterTheTreeRegisterOwenJohnson2010
3Pinus radiata (Monterey pine)9.14 mCollis Sands House, Tralee, MunsterTheTreeRegisterOwenJohnson2010
4Quercus robur (Pedunculate oak)8.57 mKing Oak, Charleville Forst, Tullamnore, Leinster Maarten Windemuller2013
5Sequoia sempervirens (Coast redwood)8.30 mWoodstock Gardens, Inistioge, Leinster Leo Goudzwaard2014
6Acer pseudoplatanus (Sycamore maple)7.90 mGolf club "The Druids Glen Course", Kilcoole, Leinster Maarten Windemuller2013
7Thuja plicata (Western redcedar)7.37 mWoodlawn House, Woodlawn, ConnachtTheTreeRegisterOwenJohnson2010
8Eucalyptus globulus (Tasmanian blue gum)7.01 mEccles Hotel, Glengarriff, MunsterTheTreeRegisterOwenJohnson2010
9Eucalyptus johnstonii (Tasmanian yellow gum)6.92 mBallynestragh estate, Gorey, LeinsterTheTreeRegisterOwenJohnson2010
10Picea sitchensis (Sitka spruce)6.75 mPowerscourt House & Gardens, Enniskerry, LeinsterAubrey Fennell2014
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Height

In this table of height records in Ireland only height measurements made by laser (like eg. the Nikon 550 Forestry) or tape drop are listed.
Of course this inventory contains only tree records as far as they are registered on this site.

How to measure the height of a tree?

NrTree speciesHeightLocationMeasurementYear
1Pseudotsuga menziesii (Coast Douglas-fir)61.50 mPowerscourt House & Gardens, Enniskerry, LeinsterTheTreeRegisterOwenJohnson2013
2Picea sitchensis (Sitka spruce)55 mPowerscourt House & Gardens, Enniskerry, LeinsterLeo Goudzwaard2014
3Tsuga heterophylla (Western hemlock)50 mAvondale Forest Park, Rathdrum, LeinsterLeo Goudzwaard2014
4Sequoiadendron giganteum (Giant sequoia)50 mPowerscourt House & Gardens, Enniskerry, LeinsterLeo Goudzwaard2014
5Abies alba (European silver fir)48.30 mAvondale Forest Park, Rathdrum, LeinsterLeo Goudzwaard2014
6Thuja plicata (Western redcedar)45.40 mPowerscourt House & Gardens, Enniskerry, LeinsterLeo Goudzwaard2014
7Eucalyptus johnstonii (Tasmanian yellow gum)45.40 mAvondale Forest Park, Rathdrum, LeinsterLeo Goudzwaard2014
8Eucalyptus globulus (Tasmanian blue gum)44 mKilruddery, Bray, LeinsterTheTreeRegisterOwenJohnson2010
9Populus × canadensis (Canadian poplar)42.70 mRiver Barrow at Borris Lock, Borris, LeinsterLeo Goudzwaard2014
10Sequoia sempervirens (Coast redwood)42.60 mWoodstock Gardens, Inistioge, LeinsterLeo Goudzwaard2014
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Age

In this table of age estimates and measurements in Ireland are shown. Of course this inventory contains only age records as far as they are registered on this site.

NrTree speciesAgeLocationMeasurementYear
1Araucaria araucana (Monkey-puzzle)165 yKilmacurragh Arboretum, Rathdrum Maarten Windemuller2011
2Davidia involucrata (Dove tree)116 yNational Botanic Garden, Dublin Maarten Windemuller2011
3Eucalyptus viminalis (Manna gum)111 yMount Usher, AshfordTheTreeRegisterOwenJohnson2013
4Abies veitchii (Veitch's silver fir)106 ± 2 yAvondale Forest Park, RathdrumTheTreeRegisterOwenJohnson2013
5Eucalyptus bridgesiana (Apple box)105 yMount Usher, AshfordTheTreeRegisterOwenJohnson2013
6Tsuga heterophylla (Western hemlock)103 yAvondale Forest Park, RathdrumLeo Goudzwaard2014
7Pseudotsuga menziesii (Coast Douglas-fir)103 yAvondale Forest Park, RathdrumLeo Goudzwaard2014
8Cryptomeria japonica (Sugi)103 yAvondale Forest Park, RathdrumLeo Goudzwaard2014
9Cupressus × leylandii (Leyland cypress)100 yHeadfort, KellsTheTreeRegisterOwenJohnson2013
10Platanus orientalis (Oriental plane)95 ± 20 yTrinity College, DublinMartin Tijdgat2013
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