A pretty perennial producing deep cherry-red flowerheads with white centres above fern-like foliage. Height 60cm. Spread 45cm. Flowers June to September. Full sun/part shade. Well-drained soil. Hardy. Attracts bees and butterflies.
Achillea millefolium ‘Cassis’ is a hardy perennial known for its vibrant, deep pink blooms and feathery, aromatic foliage. This low-maintenance plant is perfect for borders, wildflower gardens, and pollinator-friendly landscapes. Follow this comprehensive planting and care guide to ensure your Achillea millefolium ‘Cassis’ thrives and produces an abundance of flowers.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: The ideal time to plant Achillea is in spring when the soil starts to warm. This gives the plant a strong start before the growing season, leading to better flowering and root establishment.
Autumn: Alternatively, planting in early autumn allows the plant to establish its roots before winter dormancy, resulting in stronger growth the following year.
Site Selection
Sunlight: Achillea millefolium ‘Cassis’ thrives in full sun. Choose a location that receives at least 6 hours of direct sunlight daily to promote healthy growth and prolific flowering.
Soil: Well-drained soil is essential for Achillea. It tolerates poor, dry, and sandy soils but does not do well in waterlogged conditions. Improving drainage with organic matter such as compost or grit is beneficial.
Planting Instructions
Prepare the Hole: Dig a hole twice as wide and as deep as the root ball to provide space for root growth.
Soil Preparation: Mix compost or organic matter into the soil to enhance drainage and fertility.
Planting: Position Achillea millefolium ‘Cassis’ in the hole so the top of the root ball is level with the soil surface. Backfill gently and firm the soil to remove air pockets.
Watering After Planting: Water thoroughly after planting to help the roots settle. Ensure the area drains well to avoid waterlogged soil.
Watering Requirements
Growing Season: Once established, Achillea is drought-tolerant. Water occasionally during prolonged dry spells, allowing the soil to dry between waterings.
Dormant Season: Reduce watering significantly in late autumn and winter, as the plant requires minimal moisture during dormancy.
Feeding
Spring: Apply a balanced, slow-release fertiliser in early spring to support new growth and encourage vibrant flowering.
Mid-Summer: A light application of fertiliser in mid-summer can help sustain flower production throughout the season.
Pruning and Deadheading
Deadheading: Regularly remove spent blooms to encourage continuous flowering and maintain a tidy appearance.
Autumn Pruning: In late autumn, cut back to ground level to prepare it for winter dormancy and stimulate healthy growth in spring.
Mulching
Spring: Apply a light layer of mulch around the base of Achillea millefolium ‘Cassis’ to help retain soil moisture and suppress weeds.
Winter: A layer of mulch in winter provides insulation and protects roots from temperature fluctuations.
Supporting the Plant
Staking: Achillea millefolium ‘Cassis’ has sturdy stems, but in particularly windy areas, staking may help prevent bending or breakage.
Final Tips
Achillea millefolium ‘Cassis’ is an excellent choice for wildlife-friendly gardens, attracting bees and butterflies while being resistant to deer and rabbits. This resilient perennial flourishes in full sun with well-drained soil and rewards with months of colourful blooms. By following these care tips, your Achillea will thrive, adding beauty and biodiversity to your garden season after season.
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