The varying geology of Coppett Hill gives a wide range of vascular plants with the Autumn Crocus occuring where the limestone breaks through to the surface on the Ridge Path and to the east of the Hill. The area around the limekilns is rich alkaline grassland and has many orchids in the late spring.
The Trust has organised Fugal Forays for both members and the public - working with the Wye Valley AONB and the Herefordshire Fungus Society. Studies have concentrated on the east of the Hill where the woodland provides shade and the soil is over limestone.
An extensive survay of all the Woodland was carried out in 2004 as part of the Native Woodland Plan which was required by the Forestry Commission. Detailed maps were produced identifying all significant trees and giving recommendations for future management. There has been a policy to reduce the conifer plantations that were planted in the 1960's and replant with native broadleaved trees.
Much of the Hill was traditionally coppiced for firewood and charcoal; this gave a rich ground flora; this is being reinstated in some areas but damage by browsing deer presents considerable management problems.