Brook thistle (Cirsium rivulare)

Brook thistle

Brook thistle's flower heads have the characteristic thistle appearance, but the plant's petals sport a deeper shade of purple. Brook thistle is a popular ornamental, often grown in borders and alongside grasses and tall perennials. Rivulare from the Latin name translates to 'growing by a stream'. This, and 'brook' featuring in the plant's common name, represent its preferred habitat.

Scientific classification

Species

Brook thistle (Cirsium rivulare)

Asters bellflowers fanflowers and allies

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Perennial

Lifespan

Herb

Plant Type

Summer

Bloom Time

Fall

Harvest Time

1.5 m

Plant Height

60 cm

Spread

Green, Silver

Leaf Color

3 cm

Flower Size

Images of Brook thistle

Distribution of Brook thistle

Distribution Map

Brook thistle thrives naturally across much of the European continent, particularly in temperate zones. In its native groves, brook thistle can be found in a broad range extending from central to eastern Europe. In terms of cultivation, brook thistle has been introduced and nurtured in various parts of northern and western Europe, signifying its adaptability and ornamental appeal.

Native

Cultivated

Invasive

Introduced

No species reported

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Cultivars

There are several recognized cultivars of Brook thistle, including the following common varieties :

Brook thistle 'Atropurpureum'

Care Guide for Brook thistle

Every week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Brook thistle flourishes in moist environments, requiring consistent soil moisture without waterlogging. Weekly watering suffices, and it benefits from rainwater during its growing season, enhancing vitality. As an herbaceous perennial, it thrives outdoors, mirroring conditions found near stream banks.

Fertilize: For optimal health, brook thistle needs balanced fertilization during the growing season and high phosphorus pre-flowering. Apply a general-purpose fertilizer monthly in spring and summer, halving for potted brook thistle. Reduce feeding during dormancy and avoid over-fertilization to ensure brook thistle thrives year-round.

Pruning: Brook thistle features deep-red flowers and requires careful pruning in early to late spring to encourage new growth. Prune faded stems and remove damaged leaves for health. Regular trimming prevents overgrowth and maintains appearance, while using clean tools minimizes disease risk, enhancing ornamental appeal.

Propagation: To propagate brook thistle, use division by splitting mature plants into sections with shoots. Replant at the original depth, ensuring space for growth. Regular watering post-replanting is crucial for establishment. With care, these divisions will thrive and enhance the garden with brook thistle's unique foliage and blooms.

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