Alisma lanceolatum

RHS Plant Profile

narrow-leaved water plantain

visionspictures.com

Other common names

dŵr-lyriad culddail

Synonyms

Alisma plantago-aquatica var. lanceolatum

Aquatic

Buy this from Plant Nurseries
3 Suppliers

A perennial aquatic that grows in shallow water, with its roots submerged and its leaves and flowers rising above the surface. It reaches 70cm tall and 25cm wide and has lance-shaped leaves 12 to 40cm long and 1 to 3cm wide, that grow in a rosette at the base of the plant, with submerged leaves being smaller and less veined. From June to August, it produces small, pinkish-purple, three-petalled flowers that grow in circular clusters along branching flower stems, opening in the morning

Position

Full sun

Soil Types

Clay, Loam, Sand

Size

Time to Maturity: 2–5 years

Growing Conditions

Clay Loam Sand

Moisture: Poorly–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: East–facing or North–facing or South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Alismataceae
Native to GB/Ireland: Yes
Foliage: Deciduous
Habit: Submerged, Tufted
Genus: Alisma are rhizomatous herbaceous perennials from wet habitats, with basal rosettes of long-stalked, elliptic leaves and open panicles of small white or pink flowers in spring
Name Status: Correct

How to Grow

Cultivation

Grow at pond margins in water up to 30cm deep. Deadhead regularly in order to prevent problems from self-seeding. See pond plants and bog gardens for further advice

Propagation

Propagate by seed sown as soon as ripe or by rhizome division in spring

Suggested planting locations and garden types

Cottage and informal garden
Wildlife gardens

Pruning

Deadhead regularly in order to prevent problems from self-seeding

Pests

Generally pest-free

Diseases

Generally disease-free