Los Realejos Deploys 3D Monitoring to Protect Historic Dragon Trees

The Los Realejos City Council has introduced 3D monitoring technology for the twin dragon trees of Realejo Bajo, marking a significant step forward in protecting northern Tenerife’s botanical heritage. This move aims to detect structural issues early by constantly recording the trees' movements. The decision follows the collapse of the 270-year-old San Francisco Dragon Tree on March 4th, which fell during a storm and highlighted how vulnerable these historic symbols can be.

Coordinated by the Department of Rural Development and Environment and the public entity Realserv, this project goes beyond simple visual checks. Mayor Adolfo González, Councilor for Historical Heritage Isabel Socorro, and experts from the Island Council recently oversaw the installation of sensors near the Church of Nuestra Señora de la Concepción. These sensors provide precise data on the health of the trees, which are over 150 years old, and are part of a rigorous monitoring program managed by specialized firms.

This initiative is the latest phase of a municipal strategy that began three years ago. The City Council now conducts regular inspections of its unique trees, working alongside experts from the Drago of Icod de los Vinos and the Puerto de la Cruz Botanical Garden. The council’s efforts also extend to private property, where they provide technical advice to owners—as seen recently with the Siete Fuentes Dragon Tree.

The loss of the San Francisco Dragon Tree has pushed the council to strengthen its maintenance protocols. By combining advanced technology with ongoing scientific advice, the local government is shifting from reactive repairs to proactive prevention. Through these measures, Los Realejos aims to protect its botanical legacy from the risks of age and extreme weather, ensuring the survival of trees that are vital to the municipality’s history and landscape.