Also called Cats Whiskers, Bicoloured Cat's Whiskers, Blue Butterfly Bush, Blue Cat's Whiskers, Blue Flowered Tinderwood, Namibian Cat's Whiskers, Rough Leaved Cat's Whiskers
In Singapore: Blue Butterfly Bush, Blue Glory Bower, Blue Oxford Bush, Blue Cambridge Bush (Cultivated in Singapore)
Rotheca myricoides is a shrub or subshrub from the mint family, native to mountains from Eritrea to South Africa and grown for its blue-violet, butterfly-like flowers. It needs warmth and good sun, and it cannot tolerate frost.
Family
Lamiaceae (Mint family)
Grows as
Shrub
Light
Full sun, Part shade
Water
Water regularly during the growing season and let the top of the soil dry out between waterings.
Soil
Well-drained, fertile loam or a standard potting mix with added grit.
Temperature
18–30 °C; protect below 10 °C
How easy
Easy
Native range
Eritrea to S. Africa
Climate
seasonally dry tropical
About
Rotheca myricoides or Butterfly Clerodendrum, Butterfly Bush, and (butterfly bush – also a name for Buddleja species) is a species of flowering plant in the family Lamiaceae. It is native to tropical eastern Africa and widely cultivated elsewhere. In cultivation, it is frequently known by one of its synonyms, such as Clerodendrum myricoides.
The cultivar 'Ugandense' is an untidy evergreen shrub growing to 4 m (13 ft) tall and 2.5 m (8.2 ft) broad, with oval leaves and masses of pale-violet blue butterfly-like flowers in summer and autumn. Each flower has a darker blue lower petal. With a minimum temperature of 10 °C (50 °F), this plant can only be grown under glass in temperate zones. The altitude range for this species is 900–1680 m. The plant has won the Royal Horticultural Society's Award of Garden Merit.
Where it grows
Rotheca myricoides is native to mountains from Eritrea to South Africa. It is native to Angola, Botswana, Burundi, Caprivi Strip, Democratic Republic of the Congo, Djibouti, Eswatini, Eritrea, Ethiopia, Kenya, KwaZulu-Natal, Malawi, Mozambique, Namibia, Northern Provinces, Rwanda, Somalia, Sudan, Tanzania, Uganda, Zambia, and Zimbabwe. It was introduced to Trinidad-Tobago, Australia, and Brazil.
[Contains information from Leaf Area Index (LAI) and Heritage Trees from data.gov.sg (National Parks Board), made available under the terms of the Singapore Open Data Licence version 1.0]
Text excerpted from the Wikipedia article Rotheca myricoides by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.