Helenium are dependable perennial blooms the flower from late summer into fall with numerous bright yellow pin-cushion flowers atop tall stems. It looks superb in mass plantings. Stake these tall growing plants in windy gardens. Ordinary, well-drained soil will do, but helenium prefers rich soil at a pH of 5.5 to 7.0. Don’t let the soil dry out completely during the growing season, and deadhead regularly once flowering begins.