The Tamil Nadu government has issued a new advisory to restrict the planting and sale of the exotic tree species Conocarpus, widely used in urban landscaping and public spaces.

Known for its fast growth and evergreen foliage, Conocarpus has been a popular choice in greening initiatives along roadsides, in road medians, and public gardens. The tree’s ability to thrive in a variety of soil and climatic conditions makes it an ideal ornamental species for urban development. However, concerns about its impact on public health and the environment have led the government to reconsider its use.

A recent Government Order issued by P. Senthil Kumar, Principal Secretary to the Departments of Environment, Climate Change, and Forests, to the Principal Chief Conservator of Forests in Chennai had pointed out the tree’s potential health risks, particularly its pollen, which can trigger respiratory issues like allergies, asthma, and common cold symptoms.

During the flowering season, the tree releases large amounts of pollen, which can spread across surrounding areas, affecting people living and working nearby. Numerous cases of pollen-related illnesses have been reported, the G.O. said.

In response to these concerns, the State government has decided to halt the planting of Conocarpus trees on forest lands, government properties, and areas near human habitations, including hotels, resorts, and educational institutions.

The government has also initiated a comprehensive replacement programme, instructing local bodies and government departments to remove existing Conocarpus trees from public spaces, parks, and roads, replacing them with native tree species. District Green Committees, which oversee environmental initiatives at the district level, have been given the authority to grant blanket permissions to facilitate the removal and replacement process.

Further, the government is offering free native tree saplings to private individuals, institutions, and organisations that wish to replace Conocarpus with local species. Citizens can contact the Forest Department or the Green Tamil Nadu Mission for assistance, either through a dedicated toll-free number or via the “GTM Plant a Tree” mobile app.