- General Herb Information - Elecampane - Horseheal ( Inula Helenium ). - Propagation: By seed, germination about 15 days; by root division in spring; in the fall by offsets with 1 bud and 1 eye, taken from the parent root and set out. - Nature of Plant: 10 feet high, sturdy, almost unbranching plant with huge leaves, broad at the base and tapering to a point; small orange flower disks bordered with a shaggy fringe. - Spacing of Mature Plants: 2 to 2 1/2 feet. - Cultural Requirements: L