Officials are concerned the mystery seeds, which appear to have originated in China, could be invasive plant species. "Pls don't plant seeds from unknown origins!" Anyone in Kentucky receiving packages of foreign or unfamiliar seeds should contact the state agriculture department immediately, Quarles said. "Unsolicited seeds could be invasive and introduce unknown diseases to local plants, harm livestock or threaten our environment." MDA is aware that people across the country, including in Maryland, have received unsolicited packages of seeds from China in recent days.