Plant hornworts in a sunny area with well-drained, fertile soil to ensure proper growth. First, dig a hole twice as deep and wide as the plant root ball. Next, place the plant in the hole, covering it with soil, ensuring that the top of the root ball is level with the ground surface. Water the hornworts immediately after planting, maintaining consistent moisture levels thereafter. While these general guidelines apply to most hornworts species, it's crucial to investigate the specific needs of the species you're planting for optimal results.