In 1698 the first of 17 acts was passed to encourage or enforce planting. The 1765 act enabled tenants to receive benefit from planting trees, if there was a record of the planting and this led to the creation of the registers of trees, from 1768 to 1911. These records are on a county basis and detail the townland, year, name of tenant and number of each type of tree planted.
Tree registers were examined up to the 1830s for Co Londonderry. Information on the registration of trees planted is available for all six counties, but only Co Londonderry’s cover the 18th century and it is also the only county to have its register published.