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Lagarosiphon major

Curly water thyme

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Key information

Plant type

Aquatic

Flower colour

Pink

Hardiness

Hardy

Skill level

Beginner

photo by bbc.co.uk/gardening

Plant details

L. major, also known as Elodea crispa makes a dense submerged aquatic perennial that is excellent as an oxygenator, which has stems capable of hiding baby fish from predators. It enjoys ponds and slow moving water, where its mass of branches have numerous, linear, spirally arranged leaves. Plants occasionally produce very small pink flowers in summer, although these are often overlooked. Stems can reach 1m (3ft) long. Excess growth should be regularly thinned during summer to prevent it swamping the pond. Plants should be positioned in the pond at a depth of 25cm (10in) to 75cm (30in). As a general rule, plant one bunch for every square metre of your pond to ensure good water oxygenation. As this species can be invasive in the wild it should not be allowed to spread into areas outside your own garden.

Family: Hydrocharitaceae

Genus: Lagarosiphon

Species: major

Plant type: Aquatic

Flower colour: Pink

Foliage colour: Dark green

Sun exposure: Full sun

Hardiness: Hardy

Skill level: Beginner

Height: 0cm

Spread: 250cm

Time to divide plants: April to June

Time to take cuttings: April to August


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