‘Cosmic Whisper’ is a brand new inter-specific hybrid which offers considerable opportunity for future development. This exciting cultivar is a true perennial sunflower, with larger golden yellow flowers than H. salicifolius cultivars and has broader leaves. As the tallest selection in the series ‘Cosmic Whisper’ has proven reliably wind-stable. Blooms late season. Excellent for the late summer early autumn border, especially striking when planted en masse. Dies back in winter before erupting again the following spring. Hardy. 1.2 x 0.7m.

Bright golden yellow flowers.

Broad mid-green foliage.

Tight clumping habit.

Fertile well-drained soils in sun or part-shade. Feed regularly to maintain performance. Trim back hard after flowering.

Hardy. (USDA Zone: 4 - 9)

Bred by Dr. Keith Hammett, Auckland, New Zealand.

Plant Variety Rights asserted.

Tip cuttings. License required for propagation.