Clump-forming perennial with prickly, dark green leaves, softly hairy beneath, and attractive purple, thistle-like flowers. Height 1.2m. Spread 60cm. Flowers May to July. Full sun. Hardy.
Cirsium rivulare ‘Trevor’s Blue Wonder’ is a clump-forming perennial thistle known for its striking purple, thistle-like flowers. This hardy plant features dark green, prickly leaves that are softly hairy underneath. It reaches a height of approximately 1.2 meters with a spread of 60 cm, making it an excellent choice for adding vertical interest to garden borders. Blooming from May to July, Cirsium rivulare ‘Trevor’s Blue Wonder’ thrives in full sun and well-drained soil, attracting pollinators while requiring minimal maintenance.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: The optimal time to plant Cirsium rivulare ‘Trevor’s Blue Wonder’ is in spring when the soil begins to warm. This allows the roots to establish before the flowering season, promoting strong and healthy growth.
Autumn: Alternatively, early autumn planting enables your Cirsium to settle in before dormancy, ensuring vigorous growth in the following season.
Site Selection
Sunlight: Cirsium rivulare ‘Trevor’s Blue Wonder’ thrives in full sun. Select a location that receives at least six hours of direct sunlight daily for optimal flowering and plant health.
Soil: Well-drained soil is crucial for Cirsium. Avoid waterlogged conditions by improving drainage with compost or well-rotted manure.
Planting Instructions
Prepare the Hole: Dig a hole twice as wide and the same depth as the root ball to provide ample space for root expansion.
Soil Preparation: Enrich the soil with organic matter to enhance fertility and structure. Cirsium benefits from nutrient-rich soil to support robust flowering.
Planting: Position the plant in the hole, ensuring the top of the root ball is level with the surrounding soil. Gently backfill and firm the soil to eliminate air pockets.
Watering After Planting: Water thoroughly to settle the soil and encourage strong root establishment. Ensure the planting area drains well to prevent excess moisture retention.
Watering Requirements
Growing Season: Once established, Cirsium is relatively drought-tolerant. Water moderately during dry spells, allowing the soil to dry slightly between watering sessions.
Dormant Season: Reduce watering in colder months, as Cirsium requires minimal moisture during dormancy.
Feeding
Spring: Apply a balanced, slow-release fertiliser in early spring to encourage healthy foliage and flower production.
Mid-Summer: A light feed in mid-summer sustains flowering and supports plant vitality.
Pruning
Deadheading: Regularly remove spent flowers to extend the blooming period and promote further blooms.
Autumn Pruning: After flowering has finished in late autumn, cut back stems to maintain a neat appearance and prepare the plant for winter.
Mulching
Spring: Apply a layer of organic mulch around the base of your Cirsium in spring to conserve moisture, suppress weeds, and improve soil health.
Winter: Mulching in winter provides insulation for the roots and protects against extreme temperature fluctuations.
Supporting the Plant
Staking: Cirsium rivulare ‘Trevor’s Blue Wonder’ has sturdy stems, but in particularly windy areas, staking may be beneficial to prevent damage.
Final Tips
Cirsium rivulare ‘Trevor’s Blue Wonder’ is a stunning perennial that brings height and structure to garden borders. By planting it in full sun, ensuring well-drained soil, and following this care routine, this Cirsium will reward you with vibrant purple blooms from late spring to summer. With minimal maintenance, this hardy plant is a striking addition to any outdoor space, attracting pollinators and enhancing garden aesthetics.
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