Apple-specific resources:

USApple: This organization calls itself the voice of the U.S. apple industry. It represents apple growers, apple associations, and apple-related companies. Its mission is to advocate for apple growers and their products—and to encourage us all to get that apple a day.
https://usapple.org/

State Apple Associations: USApple has a list of apple grower associations, listed by state. While the focus is mostly for commercial growers, there’s also information there for the home apple grower.
https://usapple.org/state-apple-associations

Harlem Grown: If you think apples only grow in the country and the suburbs, think again. Visit this site to see how urban farming is bringing fresh food resources into city gardens.
http://www.harlemgrown.org/

National Apple Museum: Learn all about the history of the apple at the National Apple Museum in Biglerville, Pennsylvania. The museum traces the history of the growth of the apple industry in the U.S., complete with exhibits and collections of historical farming implements. See the collection of apple-themed sheet music (“Don’t Sit Under the Apple Tree,” “Little Green Apples”) and check out the museum’s collection of antique apple-themed postcards. The site also has links to many apple festivals around the world.
http://www.nationalapplemuseum.com/index.html

Hoss Tools: This Georgia company is dedicated to helping you grow your own food. The site has a broad selection of loppers as well as a versatile fruit tree watering kit.
https://hosstools.com/

Orange Guard: This California company is taking a non-toxic approach to effective pest control, including pests that plague apple trees.
http://orangeguard.com/

Tree Help: If you have problems with insect infestations on your trees, you can install a physical barrier to deter them. This is especially helpful for crawling insects that need to climb the tree’s trunk to get to the leaves and fruit. This company sells something called a Bug Band—a long-lasting sticky strip you wrap around your tree’s trunk to deter and catch insects.
https://www.treehelp.com/treehelp-bug-band-protective-insect-barrier-10-ft/

University of Maryland Extension: The University of Maryland is just one example of many extension centers throughout the country that offer growing tips to home gardeners. Check out this site, or look for an extension center near you.
https://extension.umd.edu/

Williams-Sonoma: This shop has a reputation for having practically everything you need for your home. If you feel you can’t live without an old-fashioned apple peeler, you’ll find it here.
https://www.williams-sonoma.com/products/old-fashioned-apple-peeler-and-corer/?pkey=capple%20corer

General gardening resources:

Baker Creek Heirloom Seeds: This site bills itself as “America’s top source for pure heirloom seeds.” You can even order a print catalog for your own perusing.
https://www.rareseeds.com/

Bonnie Plants: Buy all your seedlings online, from this family-owned business that’s been around for 100+ years!
https://bonnieplants.com/

Burpee Seeds: One of the preeminent seed companies in the country, Burpee seeds and plants are available for all growing zones and for all seasons. Burpee guarantees each and every product. Order your seeds online!
https://www.burpee.com/

Dave’s Garden: Dave's Garden is one of the largest sites for gardeners in the world. It offers tens of thousands of encyclopedic files on plants, bugs, and birds, as well as helpful articles by gardening experts. The community also supports an open and safe place for advice, shared experiences, and an active seed and plant trade. There is even a user-reviewed vendor list of sites that sell plants and seeds.
https://davesgarden.com/

Farmtek: From seed-starting supplies to gardening tools and greenhouse kits, Farmtek caters to home gardeners and commercial farmers, large and small.
https://www.farmtek.com

Gardener’s Supply Company: Get innovative gardening products to help make your garden productive and your work more efficient and satisfying. From fertilizer and mulch to planters and pots, and from cages and trellises to snippers and canning jar sets, find what you need for your garden.
https://www.gardeners.com/buy/gardening/tomato-growing/

Growspan Greenhouse Structures: Find a greenhouse for any gardening style—from hobby gardening to commercial applications. All greenhouses are made in the U.S.
https://www.growspan.com/

National Gardening Association: With over 1 million members, the National Gardening Association is dedicated to promoting gardening and providing members with tools and resources for improving their skills.
https://garden.org/

Nutrition Value: An online database to help you quickly discover the nutritional value of almost any food, including individual items and prepared dishes—both cooked and raw.
https://www.nutritionvalue.org/

Plant Natural: A great resource for managing an organic garden, Plant Natural provides advice, guidance, and products—carrying everything from organic fertilizers and natural pest control products (including beneficial insects) to compost bins and natural cleaning products for your home.
https://www.planetnatural.com/

Seed Savers Exchange: An organization “dedicated to the preservation of heirloom seeds.” As a nonprofit, Seed Savers Exchange aims to conserve and promote America’s culturally diverse, but endangered garden and food crop heritage for future generations by collecting, growing, and sharing heirloom seeds and plants.
https://www.seedsavers.org/

Stark Bro’s: You can buy food seedlings and even fruit trees online from this 200-year-old business.
https://www.starkbros.com

True-Leaf Market: This organization has been a source for non-GMO seeds since 1974. You can get seeds for almost any crop plant here.
https://www.trueleafmarket.com

U.S. Composting Council: This group sets the standards for composting, including manufacturing and utilization that are central to creating healthy soils, clean air and water, a stable climate, and a sustainable society.
https://www.compostingcouncil.org/

USDA Plant Hardiness Zone Map: Check out which zone your home garden is located in when you review this map.
https://planthardiness.ars.usda.gov/

Do you have apple resources that you find essential to growing apples? Please tell us which other resources you find valuable.