New Zealand Delphiniums is a specialist breeder of hybrid delphiniums, selling seed and plants at retail and wholesale. It is the home of the New Millennium Delphiniums range. The nursery was founded in 1982 as Dowdeswell's Delphiniums, as an alternative cut-flower crop, and it began with seed imported from England. Its seed lines have been exported to nurseries in the United States, England, Germany and other countries. The 'Sweethearts' line won the Royal Horticultural Society's Award of Garden Merit in 1994, and 'Dusky Maidens' was named International Perennial Plant of the Year in 1995. The newest introduction, 'Cinderella', won Best New Plant Introduction at the Gardeners' World show in the UK in 2019.
The nursery sells to New Zealand customers only and ships orders within the country. Its delphiniums can be grown from seed or bought as plants, and the website says the plants are robust garden plants that can also be cut for flowers. A customer on Google says the seed germinated very well after a tip on storing and sowing it, with a pumice top dressing to stop seed pushing out of the soil.