Centranthus ruber and Centranthus Albus

This duo of valerians is available at a great price. It comprises Centranthus ruber and C. ruber 'Albus'. These deciduous perennials are remarkable not only for the duration of their flowering in clusters of pink-red and white flowers, but also for their ease of cultivation in any well-drained soil. They quickly form beautiful clumps measuring 60cm (24in) to 1m (3ft) in height that bring a lot of charm to rockeries and flower beds. Adapted to dry soils, they can withstand temperatures as low as -15°C (5°F). Spontaneous sowings are frequent.

This duo consists of:

1x Centranthus ruber: this wild plant is known for its pink flowers, tending towards red, which add colour to the garden. It reaches a height of about 70cm (28in) to 1m (3ft), and thrives particularly well in limestone soil. The flowering period extends from May to September.

1 x Centranthus ruber 'Albus': a variety with white flowers. More compact, this variety measures between 60 and 80cm (24 and 32in) in height. It is more suitable for small spaces.

This duo of valerians can be planted in flower beds, rockeries, above walls, or on banks. Place the taller Centranthus ruber at the back and the more compact C. ruber 'Albus' at the front. Use 5 to 6 plants per square metre for a beautiful mass effect. The spacing between two plants should be at least 40 to 50cm (16 to 20in) for optimal growth.

The red valerian and its white form go perfectly with plants such as lavenders in dry soil. For a contrast of colours, consider perennial geraniums, especially the variety 'Rozanne' which offers a beautiful and long-lasting blue flowering. Ornamental grasses such as Pennisetum alopecuroides 'Hameln' bring a different texture. Bush roses, like 'Bonica', can be interesting to vary the heights and colours in a flower bed.