Charlene hardy waterlily is free-flowering and has a long blooming season. Not to mention, its one of the most fragrant lilies out there.  It does best in full sun or partial shade.

Planting Depth: 6" - 28"
Light Requirements: Full Sun - Partial Shade
USDA Hardiness Zones: 3-11 
Bloom Size: 6-8"
Bloom Shape: Stellate
Mature Plant Spread: 3-5 feet
Average Petals Per Bloom: 27-29