Local Organizations
Friends of Whitehall
Hopkinton Trails Club
Lake Maspenock Preservation Association
Sudbury Valley Trustees
Town of Hopkinton
State and New England Organizations
Massachusetts Association of Professional Foresters
Massachusetts Executive Office of Environmental Affairs
Massachusetts Horticultural Society
Massachusetts Land Trust Coalition
Massachusetts Natural Heritage and Endangered Species Program
Massachusetts Nursery and Landscape Association
New England Water Works Association
Northeast Organic Farming Association
National and Other Organizations
Land Trust Alliance
Lady Bird Johnson Wildflower Center
Association for Biodiversity
Garden Club of America
National Soil Survey Center
Trust for Public Land
Information about Plants and Wildlife
HALT does not endorse any product or organization mentioned in the links below.
Wildflowers of Hopkinton
Invasive Species
National Plant Database
Pesticide Active Ingredient Information
The Wild Gardener
Flowers and Plants to Attract Birds and other Wildlife