An upright, white variety of this clump-forming perennial thistle. Prickly, dark green leaves which are softly hairy beneath. Height 1.2m. Spread 60cm. Flowers May to August. Full sun. Hardy.
Cirsium rivulare ‘Frosted Magic’ is a striking, clump-forming perennial thistle known for its elegant white blooms and upright growth habit. With dark green, prickly leaves that are softly hairy beneath, this hardy plant reaches a height of 1.2m and spreads up to 60cm. Flowering from May to August, it thrives in full sun and well-drained soil, making it an excellent addition to garden borders and wildlife-friendly planting schemes.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: The ideal time to plant Cirsium rivulare ‘Frosted Magic’ is in spring when the soil has begun to warm. This allows the roots to establish properly before the main flowering period, ensuring a healthy and vigorous plant.
Autumn: Alternatively, planting in early autumn gives Cirsium rivulare ‘Frosted Magic’ time to settle before dormancy, leading to stronger growth in the following season.
Site Selection
Sunlight: Cirsium rivulare ‘Frosted Magic’ thrives best in full sun. Choose a location that receives at least six hours of direct sunlight daily to encourage strong growth and abundant blooms.
Soil: Well-drained soil is essential for Cirsium rivulare ‘Frosted Magic’. Avoid waterlogged areas, as excessive moisture can lead to root rot. Improve drainage by incorporating organic matter like 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 allow room for the roots to expand.
Soil Preparation: Mix compost into the soil to enhance fertility and structure. Cirsium benefits from nutrient-rich soil to support robust flowering.
Planting: Place the plant in the hole with the top of the root ball level with the surrounding soil. Backfill and firm the soil gently to remove air pockets.
Watering After Planting: Water thoroughly after planting to help settle the soil and establish the roots. Ensure the area drains well to prevent excess moisture buildup.
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 significantly in the colder months, as Cirsium rivulare ‘Frosted Magic’ requires minimal moisture when not actively growing.
Feeding
Spring: Apply a balanced, slow-release fertiliser in early spring to promote healthy foliage and flower production.
Mid-Summer: A light application of fertiliser in mid-summer helps sustain flowering and maintains plant vitality.
Pruning
Deadheading: Regularly remove spent flowers to prolong the blooming period and encourage further blooms.
Autumn Pruning: Cut back stems in late autumn after flowering has finished to maintain a tidy appearance and prepare Cirsium rivulare ‘Frosted Magic’ for winter dormancy.
Mulching
Spring: Apply a layer of organic mulch around the base of your Cirsium in spring to retain soil moisture, suppress weeds, and improve soil structure.
Winter: Mulching in winter helps insulate the roots and protect against temperature fluctuations.
Supporting the Plant
Staking: Although Cirsium rivulare ‘Frosted Magic’ has a sturdy growth habit, staking may be beneficial in exposed locations to prevent wind damage.
Final Tips
Cirsium rivulare ‘Frosted Magic’ is a striking perennial that adds vertical interest and elegance to garden borders. By planting in full sun, ensuring well-drained soil, and following this care routine, Cirsium rivulare ‘Frosted Magic’ will provide beautiful white blooms from late spring to summer. With minimal maintenance, this hardy plant enhances any outdoor space with its unique charm and structure.
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David Fifield (verified owner) –
Nice plants excellent service