Delphinium 'RED LARK' larkspur

Red Lark delphinium was bred in 2007 by Robert Legro in Enkhuizen, the Netherlands, with the goal of creating the reddest possible cultivar, surpassing all previous varieties with pink flowers. Specifically, it aimed to outshine Princess Caroline, which is the closest in colour but significantly paler and taller. Interestingly, although it was brought to Chicago, USA, for tissue propagation as early as 2009, it wasn’t until 2023 that it captured the attention of the horticultural community. That year, it received the Retailers' Choice Award during the National Hardware Show (NHS) in Las Vegas focusing primarily on household, workshop, and garden products. In the same year, it debuted at the European Plantarium 2023 trade show, where it wowed visitors and earned the KVBC Silver Medal in the Best Novelty category. It was undoubtedly the most photographed exhibit at the event. The cultivar is protected under US patent no. PP29761, granted in 2018.

The flowers of Red Lark delphinium are a true masterpiece and a breakthrough in breeding. They are up to 4 cm across, fully double, and lack the typical “bee” in the centre. Arranged in upright racemes 40-50 cm long, the blooms showcase a vivid coral-pink to red hue that subtly transitions to softer tones towards the base, creating a beautiful gradient. The foliage consists of palmately lobed, deeply incised leaves in a medium green shade, forming a dense understory enhancing plant’s lush appearance.

Red Lark reaches a maximum height of 60 cm and has a compact, upright habit. This shorter stature makes it ideal for smaller gardens or as the front-to-middle row in perennial borders. The sturdy and resilient stems provide stability even in windy conditions, eliminating the need for staking. Additionally, they make Red Lark an excellent choice as a cut flower, allowing its unique colouration to shine in any bouquet. The intense colour, compact growth, and relatively easy care make Red Lark delphinium a perfect addition to modern gardens. Its striking blooms combine beautifully with other pastel-toned perennials or, for contrast, neutral-coloured surrounding plants, creating harmonious yet dynamic compositions.

The flowers appear in a main flush from late May to July on 40-60 cm tall stems, opening gradually from the bottom to the top. They then sporadically rebloom until late summer, especially if regularly fertilized. Alternatively, you can cut the plant back to the ground after its main flowering period to encourage new growth, leading to a second flowering flush in September and October. It’s a breathtaking sight to see fresh, vibrantly coloured blooms in autumn, when most other plants have lost their charm and vigour, making it a standout feature in any perennial garden.

Grow larkspur in any moist but well-drained, humus-rich garden soil in full sun. It will benefit from mulching as it likes constant moisture. The plant contains toxin which may cause severe discomfort if ingested, or, to some, it may irritate skin. The plant belongs among medium-lived with a life span of 4-6 years, unless you dig out the clumps in the spring, divide them and plant back only the young and healthy ones, disposing of exhausted and old mother plant’s roots. Use a high phosphorus fertilizer every year for profuse flowering. Fully hardy to min. -34°C (USDA zone 4), possibly more.

Last update 21-04-2025