Genus: Delphinium

Delphinium

Photo/Illustration: 
Courtesy of Dowdeswell's Delphiniums
(Delphinium)
del-FIN-ee-um
Ranuculaceae
These queens and kings of the mixed border command their due attention with large, pyramidal racemes of numerous flowers that begin opening from the base. The dwarf species and hybrid giants are found in a wide range of colors to please any gardener. 
Noteworthy characteristics:  Dramatic vertical spires in rich colors.
Care:  Grow in full sun in fertile, well-drained soil. Taller species require staking and protection from strong winds. Some rebloom after deadheading.
Propagation: 

Take basal cuttings in early spring.

Problems: 

Snails, slugs, powdery mildew, Southern blight, bacterial and fungal spots, gray mold, crown and root rot, rust, white rot, white smut, leaf smut, and damping off.

Species, varieties and clutivars for genus Delphinium

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Delphinium 'Bluebird'
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Delphinium 'Delft Blue'
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Delphinium elatum