Details of...
Scientific Name: Delphinium (spp. & hybrids)
Pronunciation: del-FIN-ee-um
Common Name: delphinium
Family Name: Ranunculaceae
Plant Type: Herbaceous perennial, Flowering cut plant
Key ID Features: Leaves simple, alternate to basal, most palmately veined with 5-7 toothed lobes; flowers bilaterally symmetrical, petals usually 4-5, sepals showy and petal-like with the posterior one forming a spur.
Course(s): HORT 1193/1293

Habit: Upright
Form: Columnar
Texture: Medium - fine
Mature Size:
Height:1.3 - 2.0m
Spread:0.6 - 1.0m
Growth Rate:Fast
Origin: Garden origin (mountainous areas world-wide except Australia)
Hardiness Rating: Zone 4: (-34 to -29 C)
Exposure: Full sun, Sheltered
Soil/ Growing Medium: Well-drained
Water Use: Moderate
Landscape Uses: Attract birds, Attract butterflies, Cut flower or foliage, Floristry, Perennial border, Summer interest, Tall background, Wild flower garden
Additional Info: Google. Cultivars shown or on campus may include Magic Fountains Series, and D. 'Blue Bird', D. grandiflorum 'Summer Blues'. Over 300 species, most tall and need support. Most common locally is D. elatum. Compare to Consolida which is annual and tends to have more highly dissected leaves.
Leaf Morphology: Glossary
Form: Lobed, Simple
Arrangement: Alternate, Basal
Texture/ Venation: Palmate venation, Soft flexible
Surfaces: Glabrous
Colour in Fall: Yellow, Brown
Leaf(let) Terms:
Shapes: Orbicular
Apices: Acute
Bases: Cordate, Hastate
Margins: Dentate, Incised, Serrate

Inflorescence Type: Floriferous, Raceme
Flower Morphology:Flowers perfect
Number of Petals:5
Corolla Shape:Funnelform
Ovary Position:Superior
Colour (petals): Showy, White, Blue, Yellow, Pink, Red, Dark-red
Flower Scent: None
Flower Time at Peak: Jun, Jul, Aug
Additional Info: or in spikes or rarely in panicles; mostly bilaterally symmetrical; some cvs. double-flowered

Fruit Type: Follicle, Aggregate fruit
Fruit Colour: Brown
Fruiting Time: Sep, Oct
Additional Info: aggregates of 2 to 5 (= number of pistils)

Bark or Stem Colour:
Organ Modifications: Fibrous-like roots, Leaf-like bracts, Tuberous roots

Propagation: Seed, Cuttings, Division - below ground parts
Plant Care:
Other:dead head spent flowers, clean media or disease free soil required
Pest Susceptibility: Aphids or adelgids, Crown rot, Fungal leaf spot, Leaf miner insect, Mildew, Mites, Mold, Root rot, Rust, Slugs or snails, Stem borer insects, ( Deer resistant )
Specific Pests: Botrytis grey mold
(BED) BEDding, container, or basket
(GNH) GreeNHouse
(NRY) NuRserY
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