Borage (Borago officinalis) is a naturalized annual native to Europe that will often self seed. It may not be native, but it is a super plant in many regards. Borage is loved by bees, all parts of the plant are edible, it repels pests like hornworm and improves the soil by adding trace minerals that can be taken up by other plants.
No pre-treatment required. Sow seed at 1/4 inch depth. Do not let seedling dry out while it is establishing.