Occupying 350 ha between the villages of Wheathampstead and Sandridge, Heartwood Forest is owned and managed by the Woodland Trust and represents one of the most ambitious habitat creation projects in Western Europe. Until 2008, most of the site (other than small areas of semi-ancient woodland) was devoted to arable cropping. Since then 600,000 native trees and shrubs have been planted to create a mosaic of slowly maturing woodland and open meadows, supplemented by an arboretum containing the great majority of trees native to the UK and a newly created wetland area. We invite botanists of all levels of expertise to join a guided circular walk (c.5 km) encompassing most features of interest. There are no stunningly rare plants on offer but a great chance to see habitats in different stages of transition and hear about management and monitoring work underway. Meet at the main carpark (TL167107) at 10:00am.