'Wolong' Japanese Roof Iris has light lavender flowers flecked with purple spots above fans of wide green strap-like leaves. The foliage is somewhat floppy but lasts all summer, unlike its North American relative Iris cristata. The flowering period is late April to June. 'Wolong' Roof Iris won the 2010 American Iris Society's Award of Merit. Try it as a slow spreading groundcover or on a green roof that gets adequate moisture.

• Category: Perennials
• Alternate Cultivar: Wolong
• Hardiness Zone: 5
• Height: 24 Inches
• Spread: 24 Inches
• Bloom Color: Lavender/Purple