A real star of the late season border. Large single, bright yellow flowers are freely produced on tall deep green foliage - perfectly capable of shining from the back of the border. Large wide centers of Helianthus Capenoch Star are reminiscent of annual sunflowers that are very radiant.
Helianthus add structure to the summer border. Performs right thru August when other perennials rest. Plants are carefree in full sun. Finches flock to the dry seed heads. This cultivar will self-sow.
Prefers average, neutral to slightly alkaline soil. Well drained soil is good for overwintering, but give Helianthus a good soaking if August begins to overpower. Can be divided in spring every 3-4 years. Cut back by one-half in early to midsummer to prevent staking.