Cultivariable
Cultivariable is amazing store and website that has been an inspiration for myself and all my projects. Be sure to check out their growing guides for various niche root crops, and if you need any of the Andean crops, especially potatoes, this is the place.
Edimentals
Edimentals is a fascinating glimpse into the world of ornamental edibles and beyond. Great for information on niche edible plants you might not find elsewhere.
Radix
Radix is a botanist who has done a lot of fascinating work with neglected and underutilized root crops. Their blog is very interesting and a great source of info on some very hard-to-find edible plants.