Galtonia candicans is a bulbous perennial that produces tall spikes of white, scented flowers in July to August. It grows from bulbs to 1–1.2 metres and originates from South Africa and Lesotho. Plants suit sunny or partly shaded positions and are often used in borders, containers and as cut flowers.

Summer hyacinth (Galtonia candicans) bears scented white flower spikes in July to August and suits sunny or partly shaded borders, containers and cut.

https://en.wikipedia.org/wiki/Ornithogalum_candicans

Ornithogalum is a genus of perennial plants mostly native to southern Europe and southern Africa belonging to the family Asparagaceae. Some species are native to other areas such as the Caucasus.

Galtonia candicans

Summer hyacinth | Galtonia candicans

Galtonia princeps is a bulbous perennial that produces fragrant summer flowers in July to August. Native to South Africa, it suits full sun to partial shade and prefers well-drained, fertile soil. It tolerates neutral to slightly acidic or slightly alkaline soils and is rated H5 (hardy) for UK conditions. Use it in borders, containers or as a source of cut flowers.

Summer hyacinth (Galtonia princeps) blooms July to August and is a fragrant, hardy bulbous perennial for borders, containers and cut flowers.

Galtonia is a genus of plants in the family Asparagaceae, subfamily Scilloideae. Native to Southern Africa, the genus is named after Sir Francis Galton.