Towering spires densely packed with blue, purple, white or mauve flowers, each with a contrasting central 'bee'. A classic seed strain for the back of the border; all parts are toxic if eaten.
At a glance
- Plant type: Perennial
- Mature size: 1.8 m H × 60 cm W
- Aspect: full sun
- Water: regular, moderate watering
- Frost: hardy
- Maintenance: moderate maintenance
- Origin: Exotic
About Pacific Giant Delphinium
Delphinium 'Pacific Giants' is a fast-growing perennial in the Ranunculaceae family. It reaches around 1.8 m tall and 60 cm wide at maturity, with deciduous foliage. Blue, purple and white flowers appear in spring and summer.
Where to grow Pacific Giant Delphinium
Pacific Giant Delphinium suits cool-temperate and warm-temperate climates and grows best in full sun. It is frost hardy and shrugs off cold winters.
Soil & planting
Pacific Giant Delphinium does best in free-draining and clay soil. Dig in plenty of compost before planting, water in well, and mulch to keep roots cool.
Watering & feeding
Pacific Giant Delphinium is regular, moderate watering. A feed in spring with a balanced fertiliser keeps growth strong. In its first year, water deeply once or twice a week to settle the roots in, then taper off as it establishes.
Pruning & care
Prune Pacific Giant Delphinium after flowering to keep it compact and encourage the next flush of blooms. Overall it is moderate maintenance.
Using Pacific Giant Delphinium in the garden
Pacific Giant Delphinium earns its place for feeding bees and pollinators, cut flowers for the vase and a feature or specimen planting.
Companion planting & design
For a cohesive, low-care bed, pair Pacific Giant Delphinium with other plants that enjoy the same regular, moderate watering and cool-temperate climate. Group three or five together for impact rather than dotting single plants through the garden.
Good to know
Note that it is toxic to cats and dogs, so site it away from pets that chew.
Buying Pacific Giant Delphinium
Plant Sale lists Pacific Giant Delphinium as potted plants and seed. Stock isn't live yet — register your interest using the panel above and we'll email you the moment we have it ready.
Prefer to grow it yourself? See the Pacific Giant Delphinium seed sowing guide for depth, timing and germination.