Plant or position dragon arum Dracunculus in a partially sunny location that gets direct sunlight for three or four hours per day. For best results, look for a site that receives a bit of shade from the harsh afternoon sunlight.
Cover the surface of the soil around the dragon arum Dracunculus with a 4-inch layer of organic mulch to preserve soil moisture and prevent the growth of weeds. Top the growing medium around potted dragon arum Dracunculus plants with a 2-inch layer of organic mulch such as bark, wood chips, grass clippings or leaves.
Water dragon arum Dracunculus at least once a week to maintain moist soil while the plant is actively growing and flowering. Provide up to an inch of supplemental irrigation weekly when rainfall is insufficient. Avoid allowing the soil to become flooded, which invites root rot and other complications.
Fertilize dragon arum Dracunculus with a single application of balanced, water-soluble fertilizer at the start of each growing season. Apply the fertilizer in the early spring according to the application and rate on the product label.