Onosma

Onosma echioides

Native to:
Albania, Bulgaria, Italy, NW. Balkan Pen., Sicilia, Türkiye-in-Europe

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Boraginaceae
Genus:
Onosma
Species:
Onosma echioides
USDA Symbol:
ONEC

Growth Characteristics

Height:
30 cm
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
may,jun,jul
Bloom Colors:
yellow

Garden & Ecology Notes

Wildlife Value:
bees
Deer Resistant:
Yes

Soil Requirements

Soil Type:
rocky, well-drained, calcareous soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
prefers limestone-rich areas

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
14–42 days
Notes:
Seeds germinate best with cold stratification and light exposure. Germination can be erratic.

The above propagation data sourced from Claude AI

ORGHPS Germination Guide: Most interbreed and seed may not be what is labelled, 4°C x 1 month

Source: Ontario Rock Garden & Hardy Plant Society