Free Wildflower SeedsGet Free Wildflower Seeds from Arm & Hammer! Sign up to receive a FREE plantable seed card to grow colorful flowers in your yard, a flowerpot—anywhere you want to see a little nature. This Earth Day, even while you stay home, you and your family can take action for the environment and for your community by planting a little nature right where you need it most. Offer good while supplies last in the 48 continental United States only. Limit 1 per household.