Sources that could be helpful for your DIY homestead project:

1. Gardening Association: The National Gardening Association provides comprehensive resources for gardeners, including plant databases and care guides. You can find more information on their official website Garden.
2. Composting:
   1. Rodale Institute: https://www.amazon.com/Complete-Book-Composting-J-Rodale/dp/0875960642
   2. US Environmental Protection Agency: https://www.epa.gov/sustainable-management-food/composting
3. Rainwater Harvesting:
   1. National Sustainable Agriculture Information Service: https://attra.ncat.org/frontpage/publications/
   2. The National Wildlife Federation: https://www.fws.gov/refuge/rainwater-basin-wetland-management-district
4. Solar Panels:
   1. Department of Energy: https://www.energy.gov/eere/solar/solar-energy-technologies-office
   2. Solar Energy Industries Association: https://www.seia.org/
5. American Horticultural Society: This organization supports gardening and horticultural practices, offering educational resources and advocacy in environmental issues. Learn more on their website AHSGardening.
6. Find Extension Offices Across the USA: Publicly funded extension services connect everyone with unbiased recommendations based on the latest researchhere.
7. Poultry Health Organization: These offer inspiration and resources for farmers and/or any individual wanting to raise animals, including the latest news and information. Visit their site USDA and also USPoultry.
8. US Environmental Protection Agency: The mission of EPA is to protect human health and the environment. Find the latest on any question or concern about health and the environment. Details can be found here.
9. Water Resources Board: A list of all the USGS Water Resources Mission Area Science Centers and regions, hubs for critical water found throughout the country. here and also an interactive map of water resources across the United States here, where you can find more information on water quality, streams, lakes, etc., for any region or address. You can also find more information and a list of United States water companies by going here.  This should give a good idea of the rules and regulations for your area on water harvesting and much more.
10. Energy Information Administration: The US’s lead agency for collecting and analyzing energy information and providing educational resources. Their website can be accessed here.
11. National Greenhouse Manufacturers Association:  The National Greenhouse Manufacturers Association (NGMA) is a professional trade organization dedicated to supporting the interests of greenhouse manufacturers and suppliers. It focuses on the development and distribution of greenhouses and related components. Access their site by going here.
12. Beekeepers’ Society: The American Beekeeping Federation (ABF) has been advocating for the interests of beekeepers and the beekeeping industry for over 80 years. It aims to support beekeepers of all sizes and to secure the future of the honeybee through various initiatives and resources. Go here for more information.
13. Horticultural Society: The American Horticultural Society (AHS) enhances connections to gardening through its educational programs, awards, and publications. It promotes earth-friendly gardening practices, introduces children to plant life, unites leaders to discuss national issues, and highlights the art and practice of horticulture. You can go here for more.
14. National Herb Association: The Herb Society of America (HSA) is a volunteer-driven, nonprofit organization committed to enhancing the understanding and appreciation of herbs through educational programs and research initiatives. Find more information by visiting here.  You can search for plant names and find information that you may need at the U.S. National Arboretum. It conducts research to enhance the economic, environmental, and aesthetic value of ornamental and landscape plants. It also focuses on conserving genetic resources and providing educational gardens and exhibits. Access more information by going here.