Nearly Native Nursery: https://www.nearlynativenursery.com – Georgia Jim and Debi are serious about native plants and are broadly supportive of this initiative to help plant trees for bees.
Other nurseries selling bee-friendly trees:
Rock Bridge Trees: https://rockbridgetrees.com/ – Tennessee “Trees for Bees” is the secondary logo. Dave Hughes is serious about helping the bees and knows how: plant more trees!
Honey Tree Nursery: https://honeytreenursery.com/ – Michigan Mike Connor is an arborist and a beekeeper, and is both passionate and deeply knowledgable about nectiferous plants and nectar yields.