Helenium
Flower
Sow indoors 8-10 weeks before planting out in early spring when the soil is cool and light frost is still possible. Or direct sow in early spring or early autumn. The ideal temperature for germination is 21°C (70°F). Seeds will sprout in 7-10 days.
Helenium
How to Grow:
Flower
Timing:
Sow indoors 8-10 weeks before planting out in early spring when the soil is cool and light frost is still possible. Or direct sow in early spring or early autumn. The ideal temperature for germination is 21°C (70°F). Seeds will sprout in 7-10 days.
Starting:
Barely cover the seeds with soil. Transplant or thin to stand 60-90cm (24-36″) apart.
Growing:
Ideal pH: 5.5 - 7.0. Stake these tall growing plants in windy gardens. Ordinary, well-drained soil will do, but Helenium prefers rich soil. Don’t let the soil dry out completely during the growing season, and deadhead regularly once flowering begins. Divide clumps every three to four years to maintain vigour. Division works best in the spring north of Zone 7, and in the fall in southern climes.
Harvest:
