Delphinium Plants

At D.T. Brown, we offer a selection of top-quality delphinium plants that produce tall spires of flowers, ideal for a border display or in cottage-style gardens. Their rich colours make them work well as a focal point that draws the eye, wherever they’re placed. Our delphinium plants are nursery-grown, helping you achieve reliable results with less effort than growing from seed.

For a complete flower garden, explore other flowering plants like bare root roses for timeless beauty, Dahlia flower plants for big, layered blooms, and Rudbeckia plants for some cheerful colour. If you're planning an earlier display, consider pairing your delphiniums with other autumn planting flower bulbs for complementary textures and early-season interest.

Browse our full range of delphinium plants for sale below and enjoy the rewards of growing these majestic flowers with D.T. Brown.

When to Plant Delphiniums

Delphinium plants are best planted in spring or autumn when the soil is moist but not waterlogged. Exact planting times will depend on the variety, as some are better suited to planting earlier or later in the season. Spring planting typically occurs from March to May, while autumn planting takes place from September to October. Ensure the risk of frost has passed before planting in spring, and choose a sunny, sheltered spot with well-drained soil.

How to Grow Delphiniums

To grow delphiniums, plant them in fertile, well-drained soil enriched with organic matter. Space plants according to the variety, leaving somewhere between 30-60cm (12in-24in) between them to allow for their tall growth. Water regularly during dry spells and apply a balanced fertiliser. Stake taller varieties early to provide support as they grow, particularly in windy areas. Deadhead spent flowers to prolong blooming and cut back stems in late autumn to prepare for the following year.

Buy Delphinium Plants Today

Order your delphinium plants today with D.T. Brown and add stunning height and colour to your garden. Our nursery-grown plants are carefully selected for their exceptional quality and reliability, so you can be confident in your results. Shop now and enjoy fast delivery – your delphiniums arrive at the perfect time for planting.