Plant Database

Other Names:  Water Cabbage

Description:

This water plant has interesting square to fan shaped foliage that is velvety and beautifully ribbed; flowers are somewhat inconspicuous; excellent for edging a water feature or pond; watch for aphids; invasive in frost free areas

Ornamental Features

Water Lettuce's attractive tomentose square leaves remain bluish-green in colour throughout the year on a plant with a spreading habit of growth. It features subtle chartreuse tubular flowers with creamy white overtones rising above the foliage from early to late summer.

Landscape Attributes

Water Lettuce is an herbaceous evergreen perennial with a ground-hugging habit of growth. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.

This plant will require occasional maintenance and upkeep, and is best cleaned up in early spring before it resumes active growth for the season. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

• Spreading
• Invasive
• Insects

Water Lettuce is recommended for the following landscape applications;

• Water Gardens
• Container Planting

Planting & Growing

Water Lettuce will grow to be only 4 inches tall at maturity extending to 6 inches tall with the flowers, with a spread of 14 inches. Its foliage tends to remain low and dense right to the ground. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 10 years. As an evegreen perennial, this plant will typically keep its form and foliage year-round.

This plant does best in full sun to partial shade. It is an excellent choice for very wet locations or locations with some standing water. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. This species is not originally from North America.

Water Lettuce is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. Because of its spreading habit of growth, it is ideally suited for use as a 'spiller' in the 'spiller-thriller-filler' container combination; plant it near the edges where it can spill gracefully over the pot. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.