Delphinium glaucum

Brown's Larkspur · Hooker's Larkspur · Sierra Larkspur

Family RanunculaceaeGenus Delphinium

Small dark purple flowers with narrow pointed sepals, spaced along a stout dark stem — FlowerUnknown authorUnknown authorPublic domain

About the plant

What it is and where it grows — not part of any germination protocol.

The plant

Habit: perennialPlants of the World Online
Habit: Perennial, Forb/herbPLANTS Database
Height: 8.0 ft2.4 mPLANTS Database
Flower: PurplePLANTS Database
Blooms: Early SpringPLANTS Database
Native range: Alaska, Canada, lower 48 statesPLANTS Database

Growing conditions

Sun: Shade tolerance: LowPLANTS Database
Soil: Adapted to coarse, medium, fine textured soilsPLANTS Database
Soil pH: 5.6-7.0PLANTS Database
Moisture: Moisture use: HighPLANTS Database
Watering: Drought tolerance: NonePLANTS Database

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; PLANTS Database — USDA NRCS.

Worth knowing

Larkspurs have long been linked with livestock poisoning in North America, and Sierra larkspur, under the name Delphinium brownii, has caused problems on the rangelands of Alberta. Wikipedia: Delphinium glaucum

Protocol

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Warm moist stratification
Duration: 90 daysTemperature: 70°F 21°C
Cold moist stratification
Duration: 90 daysTemperature: 40°F 4°C

about 3 months from start to step 2. Germination happens during step 2, in 42 days.

25% germination in 28–42 days.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials