Coreopsis Mercury Rising

The Coreopsis 'Mercury Rising' is a new variety of coreopsis, remarkable in many ways: this perennial plant forms a large spreading cushion of bright green foliage that is continuously covered in dark red velvety flowers with a small golden yellow centre from summer to autumn. In addition to the visual pleasure provided by this extremely rich-coloured flowering, it also has excellent hardiness, which is relatively rare among coreopsis. Its interlacing growth with neighbouring plants, its undemanding nature, and its love for the sun make it suitable for well-exposed borders. It is also an outstanding perennial for container gardens and an excellent cut flower.

Coreopsis belongs to the Asteraceae family. 'Mercury Rising' is the latest discovery in a series of hybrids developed in the United States. This series, named 'Big Bang,' gathers varieties such as 'Cosmic Evolution' and 'Galaxy,' initially selected for their cold resistance, vibrant colours, and vigour. All these qualities are present in 'Mercury Rising,' which surprised its creators with its unusual habit: this rhizomatous perennial forms a mound that reaches an average height of 40 cm (16in) and an average spread of 75 cm (30in). The flowering period extends from late June to October, with flowers continuously appearing on the plant. The 3 cm (1in) diameter flower heads, with their sun-resistant and unalterable velvety burgundy red colour, feature a small bright yellow centre. Towards the end of the season, when the temperature drops, the petals develop white or cream streaks, giving the flowering a new dimension resembling frost. The flowers are borne on short erect stems. This plant has opposite, lanceolate, finely divided leaves measuring 4 to 7 cm (2 to 3in) in length and displaying a very airy appearance. It slowly spreads through its non-invasive rhizomes, forming a beautiful ground cover.

Coreopsis 'Mercury Rising' is a hardy and robust perennial with multiple uses. Plant it in a rock garden, on a rustic slope with wallflowers, Damask wallflowers, echinaceas, and wild flax, or in a herbaceous border alongside Teucrium chamaedrys or x lucidrys, cosmos, and annual cornflowers. In a pot or container, this plant blooms continuously from the first year. For a beautiful summer display, whether in the ground or a large pot with a bit of water, it can be paired with Stipa tenuifolia, Calamintha glandulosa, and Nepeta 'Dawn to Dusk'. It also makes a lovely addition to summer bouquets.