Marsh pea (Lathyrus palustris)

Marsh pea

Also known as: Blue marsh vetchling, Slenderstem peavine

A perennial vine, marsh pea is also a member of the wild pea family. This plant is native to North America, Europe, and Asia. Although there have not been any reports of toxicity for this particular species, it could be easily confused with a similar species that is toxic.

Scientific classification

Species

Marsh pea (Lathyrus palustris)

Legumes, milkworts and allies

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Herb, Vine

Plant Type

Spring, Summer, Fall

Bloom Time

1.2 m

Plant Height

15 cm to 30 cm

Spread

1.2 cm to 2 cm

Flower Size

Pink, Purple, Blue

Flower Color

Deciduous

Leaf type

Images of Marsh pea

Distribution of Marsh pea

Distribution Map

Marsh pea is native to several temperate regions, including the northern part of the Eurasian continent and some adjacent islands. In its native range, it spans across various climates from maritime to continental. Notably, it has been introduced to the larger area of Latin America, extending its presence beyond its indigenous territories.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Fens and damp places in grass or bushes

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Marsh pea

Every week

Water

Full sun

Sunlight

5 - 32 ℃

Ideal Temperature

Water: Marsh pea thrives in moist soil and high humidity, requiring weekly watering for optimal health. While it shows moderate drought tolerance, it prefers hydration that reflects its wetland origins. Suitable outdoor planting sites should replicate its natural water availability for successful growth cycles.

Fertilize: Fertilize marsh pea with a balanced 10-10-10 NPK formula during spring and summer, every 4-6 weeks at half strength. Avoid over-fertilization to prevent root burn and reduce feeding in fall. Water the soil before application to protect marsh pea roots.

Pruning: Marsh pea thrives with early to late spring pruning, removing old or weak stems to encourage new growth and improve airflow. Pruning post-flowering aids recovery and enhances future blooms. Reducing height by a third promotes better shape and overall plant health.

Propagation: Marsh pea propagates best through surface sowing in well-drained soil with a sand and peat mix. Maintain consistent moisture without waterlogging, and provide a balance of indirect light and shade for healthy growth after germination.

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