Delphinium 'Cobalt Dreams'

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Photo Courtesy of Walters Gardens, Inc.
 Series Name: NEW MILLENNIUM™ Delphiniums
Common Name: Delphinium-Hybrid Bee

Breeder Terry Dowdeswell has been working hard to develop a new strain of Delphiniums that have consistently deep, true cobalt blue flowers and now he’s done it! 

This new selection produces strong, tall spires tightly packed with cobalt blue florets with brightly contrasting white central bees.  They draw your attention from quite a distance and add terrific architectural presence to the garden in early summer and fall.  Uniform color and form ensure a stunning display whether planted singly or en masse.  

The English hybrid type of delphiniums are bred by Dowdeswell's Delphiniums in New Zealand and are hand crossed to produce the highest quality seed. These F1 hybrids have excellent form, strong stems, and a vigorous growth habit. They were selected for their improved tolerance of heat and humidity, while retaining their cold hardiness.

Intro Year: 2013

Breeder: Terry Dowdeswell

Introducer: Dowdeswell's Delphiniums

Origin: Not Native to North America


  4-6 Feet
  1.5-2 Feet
Flower Color:
  Blue shades
Foliage Color:
  Green shades
Hardiness Zone:
Find Your Zone
Sun or Shade?:
  Full sun (> 6 hrs. direct sun)
  Part shade (4-6 hrs. direct sun)
Wet or dry?:
  Average water needs
Want to see wings?:
  Attracts butterflies
  Attracts hummingbirds
Need critter resistant plants?:
  Deer resistant
  Rabbit resistant
How fast should it grow?:
When should it bloom?:
  Early summer
  Late summer
  Early fall
How's your soil?:
  Average Soil
  Fertile Soil
Sweet or Sour Soil?:
  Neutral Soil (pH = 7.0)
  Alkaline Soil (pH > 7.0)
What's your garden style?:


Border plants
Cut flower or foliage
Dried flower or seed heads
Mass Planting
Specimen or focal point

Homeowner Growing & Maintenance Tips:

Delphiniums thrive in the cooler climates of the north country, though they will grow as far south as zone 7. The New Millenium hybrids, however, tend to be more tolerant of heat and humidity. They grow best in rich, well-drained soil with a basic pH. If your soil is naturally acidic, adding lime will help to provide these conditions. They are also heavy feeders. The addition of compost or manure to the soil as well the use of granular fertilizer will result in healthier, stronger plants.

Delphiniums can be grown in full sun or partial shade, though full sun may help to prevent powdery mildew. When planting, be sure to set the crown at or above soil level to avoid rot. Since their stems are hollow, taller varieties of Delphiniums should be staked to prevent damage from wind and rain. These new hybrids tend to be longer lived than their short-lived cousins but may be propagated from basal cuttings.


Common/Botanical Name
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Common Name: Baby's Breath
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Clematis 'Wildfire'
Common Name: Clematis
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Common Name: Bellflower--Peach-leaved
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Echinacea 'Cleopatra' PP24631
Common Name: Coneflower
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Papaver orientalis 'Turkenlouis'
Common Name: Poppy-Oriental
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Digitalis purpurea 'Candy Mountain'
Common Name: Foxglove-Common
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While every effort has been made to describe this plant accurately, please keep in mind that the height, bloom time, and color may differ in various climates throughout the country. The description of this plant was written based on our experience growing it in Michigan (USDA hardiness zone 5) and on numerous outside resources.