Onosma — 10 species
Botanical species in the genus Onosma recorded in the PlantPeers database.
Onosma argentata
Onosma argentata
Family: Boraginaceae
Cultivation
Species in this genus generally require a sunny position in a well-drained soil. Prefers a deep rather rich sandy loam. Tolerates hot dry conditions and also drought once it is established, but dislikes moist climates at any time of the year.
Full cultivation guide →Onosma bracteata
Onosma bracteata
Family: Boraginaceae
Cultivation
Species in this genus generally require a sunny position in a well-drained soil. Prefers a deep rather rich sandy loam. Tolerates hot dry conditions and also drought once it is established, but dislikes moist climates at any time of the year.
Full cultivation guide →Onosma chlorotricha
Onosma chlorotricha
Family: Boraginaceae
Cultivation
Species in this genus generally require a sunny position in a well-drained soil. Prefers a deep rather rich sandy loam. Tolerates hot dry conditions and also drought once it is established, but dislikes moist climates at any time of the year.
Full cultivation guide →Onosma echioides
Onosma echioides
Family: Boraginaceae
Cultivation
Onosma echioides is fairly cold hardy, tolerating temperatures down to about -15°c. Requires a sunny position in a well-drained soil. Prefers a deep rather rich sandy loam.
Full cultivation guide →Onosma frutescens
Onosma frutescens
Family: Boraginaceae
Cultivation
Onosma frutescens is a moderately cold-hardy plant, tolerating winter temperatures down to about -15°c. Species in this genus generally require a sunny position in a well-drained soil. Prefers a deep rather rich sandy loam.
Full cultivation guide →Onosma hispida
Onosma hispida
Family: Boraginaceae
Cultivation
Species in this genus generally require a sunny position in a well-drained soil. Prefers a deep rather rich sandy loam. Tolerates hot dry conditions and also drought once it is established, but dislikes moist climates at any time of the year.
Full cultivation guide →Onosma microcarpa
Onosma microcarpa
Family: Boraginaceae
Cultivation
Species in this genus generally require a sunny position in a well-drained soil. Prefers a deep rather rich sandy loam. Tolerates hot dry conditions and also drought once it is established, but dislikes moist climates at any time of the year.
Full cultivation guide →Onosma paniculata
Onosma paniculata
Family: Boraginaceae
Cultivation
Species in this genus generally require a sunny position in a well-drained soil. Prefers a deep rather rich sandy loam. Tolerates hot dry conditions and also drought once it is established, but dislikes moist climates at any time of the year.
Full cultivation guide →Onosma sericea
Onosma sericea
Family: Boraginaceae
Cultivation
Species in this genus generally require a sunny position in a well-drained soil. Prefers a deep rather rich sandy loam. Tolerates hot dry conditions and also drought once it is established, but dislikes moist climates at any time of the year.
Full cultivation guide →Onosma setosa
Onosma setosa
Family: Boraginaceae
Cultivation
Onosma setosa is native to semi-arid regions of the temperate zone and does not grow well in moister climates. It is a very cold-tolerant plant, however, and when fully dormant it can withstand temperatures down to about 20°c. Species in this genus generally require a sunny position in a well-drained soil.
Full cultivation guide →