Blue Tropical Waterlilies

Nymphaea 'Blue Beauty'
The fragant, day blooming, star-shaped flowers, 20-28cm (8-11in) across, have mauve petals surrounding yellow stamens. The oval, dark green, wavy-margined leaves grow to 35cm (14in) across and have brown speckling on the upper surface. It requires a minimum water temperature of 10 degrees celcius (50 degrees  F)
Suggested planting depth: 38cm (15in)

Nymphaea 'Rhonda Kay'
This day-blooming cultivar has star-shaped, violet-blue flowers, 15cm (6in) across, held high above the water, with deep yellow stamens. The leaves are mid green, slightly longer than they are wide at 28-30cm (11-12in) across.
Suggested planting depth: 45cm (18in)