Saururus cernuus – Lizard’s Tail or Swamp Lily is native to eastern North America and features white arching bottlebrush flowers (spikes from 6-8″ long) from July to August. The 3-4″ long green leaves are heart to arrowhead-shaped. Best in part to full sun. Water depth to crown 0-4″ (depending on the height of the plant). Grows 18 to 24″ high. Hardy to zone 5.
Tulbaghia violacea ‘Variegata’ (syn. ‘Silver Lace’) – Variegated Society Garlic is slower growing than the species but does have larger flowers. It features fragrant pale lavender blooms from midsummer to early fall. The grass-like greyish-green foliage has fine white margins and gives off a garlic scent. Water depth to crown 0-6″. Grows to 30″ high. Hardy to zone 7.
Lysimachia congestiflora ‘Outback Sunset’ – This Dense-Flowered Loosestrife features rounded light green foliage with broad but irregular golden variegated margins. It bears clusters of bright yellow flowers continuously from spring through the summer. This makes a nice edging plant for the pond due to its spreading nature. Water depth to crown 0-1″. Grows 6″ high by 12-15″. Zone 7.
Pontederia dilatata (syn. ‘Royal Blue’) – Royal Pickerel Weed grows much taller than the traditional species and features lavender-blue flower spikes (up to 6″ long) from July through to September. It is a highly architectural plant with elegant green lance-shaped leaves. Water depth to the crown 0-12″. Grows 4-5′ high by 2′ wide. Hardy to zone 7.
Colocasia esculenta ‘Illustris’ (syn. Colocasia antiquorum) – Imperial Taro is primarily a tender foliage plant with leaves up to 14″ long (3′ in tropical climates) that are pale emerald green with violet-purple between the veins. Taro is best grown in light shade but seems to tolerate full sun here in coastal BC. Overwinter as a houseplant. Water depth to crown 0-6″. Grows 3-5′. Zone 8.