Helvola is is a great lily for patio ponds because of the small leaves and flowers. This is definitely a miniature lily. Flowers and leaves are about the size of a US quarter.
This miniature lily does well in patio gardens and barrels.
Shade tolerant
How to grow water lilies
Dwarf 6 to 18 inches of water over the top of the pot
Full Sized 12 to 24 inches of water over the top of the pot
Flowers May - September
Hardy zone 3 or higher
Related links
Lily types
Hardy or Tropical
Planting lilies
Step by step photos
Planting Lilies
diagrams
Protecting Lilies
From fish