Iris sibirica ‘Pennywhistle’ is a captivating Siberian iris cultivar introduced by hybridizers Marty Schafer and Jan Sacks in 2000. This perennial is celebrated for its elegant blooms and robust growth habit, making it a favored choice among gardeners and landscape designers.
The plant reaches a height of approximately 34 inches (86 cm) and flourishes in early to midseason, typically around June. The blossoms display a harmonious blend of colors: the standards (upright petals) are violet, while the falls (downward petals) are blue-violet with darker veining. A prominent feature is the large signal patch that transitions from gold to yellow and cream, intricately veined with dark blue-violet, adding a striking contrast to the flower’s palette. The style arms are light blue with a darker midrib, and the flowers emit a slight fragrance, enhancing their appeal.
‘Pennywhistle’ thrives in full sun to partial shade and prefers well-drained, slightly acidic soil. It is hardy in USDA Zones 4 through 9, demonstrating resilience in a variety of climates. The plant’s foliage forms narrow, grass-like leaves that maintain their lush green appearance throughout the growing season, providing an attractive backdrop to the vibrant flowers.
This cultivar is not only visually appealing but also low-maintenance, resistant to many common pests and diseases. Its vertical form and striking coloration make it an excellent addition to perennial borders, water gardens, and naturalized areas. ‘Pennywhistle’ also makes for a delightful cut flower, bringing its serene beauty indoors.
In summary, Iris sibirica ‘Pennywhistle’ combines aesthetic charm with hardy growth, making it a versatile and rewarding choice for gardeners seeking to enhance their landscapes with a touch of elegance.
American Iris Society Registration Data
- Description – S. violet; style arms light blue, midrib darker; F. blue violet, darker veining, large signal gold, changing to yellow and cream, veined dark blue violet; slight fragrance. S89-23-1: (S85-6-6: (Star Cluster x Ruffled Velvet) x Isabelle) X Snow Prince
- Hybridizer & Year of Introduction – Marty Schafer/Jan Sacks, 2000
- Classification – Siberian
- Bloom Period – Early midseason
- Bloom Height – 34″