These are defined areas within which similar ecological and climatic characteristics are found. They provide a framework for specifying sources of Forest Reproductive Material (FRM).
For native species, these Regions of Provenance have been split into a total of 24 non-statutory native seed zones. Seed zones are in turn divided where appropriate into two altitude zones, below 300m and above 300m.
There is a different set of seed zones for native Scots Pine.
The Forestry Commission maintains the National Register of Approved Basic Material for Great Britain (The National Register). Attribution statement: © Forestry Commission copyright and/or database right 2010. All rights reserved.
