Hoary alyssum (Berteroa incana)

Hoary alyssum

Also known as: Hoary berteroa

Hoary alyssum (Berteroa incana) is a flowering plant related to mustard that is native to Eurasia. Also known as false hoary madwort and hoary berteroa, it is considered an invasive weed. You can find them easily on roadsides and lawns.

Scientific classification

Species

Hoary alyssum (Berteroa incana)

Mustards, capers, and allies

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Toxic to Humans

Toxicity

Weeds

Weed or not

Annual, Perennial, Biennial

Lifespan

Herb

Plant Type

Fall

Bloom Time

Early fall

Harvest Time

80 cm

Plant Height

80 cm

Spread

Green, Silver, Blue, Gray

Leaf Color

2.5 cm

Flower Size

Green

Fruit Color

White

Flower Color

Spring, Summer, Fall

Growth Season

Rapid

Growth Rate

Images of Hoary alyssum

Distribution of Hoary alyssum

Distribution Map

Hoary alyssum is native to a wide range in the temperate regions of Eurasia, specifically in certain parts of central, eastern, and northern Europe, as well as parts of western and central Asia. Additionally, it has been introduced to various parts of northern and western Europe, where it has become naturalized.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Flood plains, meadows, waste places, railroad embankments, woodlands, grasslands, roadsides, fields, stream banks, pastures, hillsides, forest floor

Hemisphere Trend Curve

Northern

Sorthern

Culture

Symbolism

Worth beyond beauty

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Quickly Identify Hoary alyssum

Silvery grey-green foliage due to dense hairs.

Racemes of white flowers with 4 deeply lobed petals.

Round, flat siliques with persistent style, pale in color.

Densely hairy, woolly stems, ranging from 0.1 to 0.3 inches.

Toothless, alternate leaves with star-shaped hairs, 1-3 inches long.

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Care Guide for Hoary alyssum

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Hoary alyssum thrives in temperate climates, requiring consistent moisture without waterlogging. It prefers weekly watering to mimic natural precipitation, especially during its active growing season. While it tolerates brief dryness, stability is key for its health and growth.

Fertilize: To ensure hoary alyssum thrives, use balanced fertilizers in spring and switch to high-nitrogen during vegetative stages. Fertilize monthly at quarter strength, avoiding overfeeding. Reduce frequency in cooler months and wear gloves during application. Seasonal adjustments promote hoary alyssum's health and vitality.

Propagation: Propagation of hoary alyssum occurs primarily in Spring through sowing. Successful germination is marked by emerging seedlings, facilitated by adequate moisture and well-draining soil, making the process relatively easy.

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