Roadside pepperweed (Lepidium ruderale)

Roadside pepperweed

Also known as: Peppergrass, Peppercress

Roadside pepperweed (Lepidium ruderale) is native to Eurasia, and a member of the mustard family. Three other names for it are peppergrass, narrow-leaf pepperwort, and stinking pepperweed. It’s called that last name because some people think it smells of oil or smoke. This is wrong because it has no scent of its own. The noxious smell is because it often grows by the side of railroad tracks.

Scientific classification

Species

Roadside pepperweed (Lepidium ruderale)

Mustards, capers, and allies

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Annual, Biennial

Lifespan

Herb

Plant Type

All year round

Bloom Time

10 cm to 20 cm

Plant Height

Semi-evergreen

Leaf type

20 - 35 ℃

Ideal Temperature

Images of Roadside pepperweed

Distribution of Roadside pepperweed

Distribution Map

Roadside pepperweed is originally native to a wide range of regions across Europe and parts of Asia and the Middle East. It has adapted to various climates and has been introduced to continents such as North America, South America, Asia, Africa, and Oceania, thriving across several major regions within these continents.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Waste places, waysides, seasides

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Roadside pepperweed

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Roadside pepperweed prefers consistent moisture, benefiting from weekly watering. It is moderately drought-tolerant and thrives better outdoors with natural rainfall. In indoor settings, careful attention to soil moisture is essential to avoid overwatering and root issues.

Fertilize: For roadside pepperweed, regular fertilization enhances growth with balanced nutrition and high-nitrogen fertilizers during active seasons. Apply every 4-6 weeks, adjusting for dormant periods. Avoid foliage contact during application and water thoroughly afterward for optimal nutrient uptake, supporting vigorous development for all gardeners.

Pruning: Roadside pepperweed is an annual herb known for its small, peppery leaves and white flowers. Prune from early to late spring to promote dense growth, remove dead stems, improve air circulation, and enhance aesthetics. Regular pruning supports vitality and reduces disease risk.

Propagation: Roadside pepperweed is propagated by sowing in a well-draining soil mix. Seeds should be sown thinly, with light contact to ensure adequate light for germination. Maintain moist soil without waterlogging, and once seedlings mature, they can be transplanted to their final location.

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