The 24-strong committee was elected after a meeting at SCI's headquarters, in Belgrave Square, on 9 September.
Hall said: "I believe we now have the right mix of people who all bring with them a wide range of experience from all backgrounds."
The next group event, Growing Success: Horticultural Business Perspectives, is on 21 November at SCI headquarters.
Topics will include the fresh food market, by Tesco's former fresh produce and horticulture director, Peter Durose; facilitating a project with the KTP Grant, by consultant Paul Naylor; and heritage plant conservation, by Barry Mulholland from Duchy College.
SCI COMMITTEE MEMBERS
Ordinary group members: Margaret Waddy, Sue Grimbly, Marion Stainton, Carl Gill, William Hudson, Don Murray, Sophie Hawkins, David Whalley, David Miller, Geoff Dixon, Leon Terry, Chris Whitworth, Phil Mullington, Murree Groom, Guy Moreton, Robin Turney
Co-opted members: Jeff Moorby, Peter Thoday,Trevor Gibson
Corresponding members: Oliver Menhinick.