The list covers both traditional sources, such as garden centers, and some that might not be as obvious, such as historic plantations. Seed providers range in size from large national seed companies to mid-scale farms to seed banks to individuals who sell packets from their home gardens. Some specialize in specific plants or growing regions, and some sell only non-GMO, organic, heirloom, or open pollinated seeds.

This list is specifically designed for home gardeners looking to purchase individual seed packets, not wholesale seed, bulk seed, live plants or bulbs, though some companies provide those as well. Fruit seeds are limited because most fruits are purchased as live plants or bare roots. Exceptions are strawberries and melons, which are often grouped under vegetables.

I highly recommend checking out these websites and ordering some free catalogs. They are filled with fabulous photography and illustrations, growing tips, recipes, detailed product descriptions, gardener profiles, seed histories, instructional videos, and gardening supplies that you won't find in the big chain stores. Most importantly, you'll find a much greater selection of varieties of each plant. For instance, there are dozens of basil varieties on the market, including lemon and lime, and each company carries a different selection. You'll also find a community of passionate gardeners with whom you can connect. Sign up for their e-newsletters to get their latest product offerings and guidance for growing in the current season.

Note that this is not a recommendations list, as I have only purchased seeds from a few of these companies. It is meant to be informational so that you can search, compare and decide for yourself. This list is a work in progress and will be updated as I discover more sources.