Jasminum grandiflorum aka Catalonian Jasmine

Jasminum grandiflorum, or Spanish jasmine, belongs to the olive family, Oleaceae. Its native range spans eastern Africa, Arabia, and parts of Asia. Kew places its eastern limit in south-central China. This scrambling shrub grows in warm temperate, subtropical, and tropical regions. Gardeners grow it for its scent and leafy cover. Growers also raise it for flower oil.

The plant can keep its leaves or shed them. Sources give usual sizes of about 7–13 feet [2–4 metres]. Longer stems may reach 16 feet [5 metres]. One compact estimate gives 8 feet [2.5 metres] tall. That estimate gives a spread near 1.6 feet [0.5 metres]. Leaves grow in opposite pairs along the stems. Each pinnate leaf has five to eleven leaflets. The dense growth can form a living garden screen. Stakes, trellises, or wire frames give the stems support.

White flowers provide the plant’s strong scent. Insects pollinate them, though seed production is often low. Plants may first bloom about six months after planting. Growth stays slow during the first two years. Flowering becomes much heavier from the third year onward. Warm-region plants may flower for seven to nine months yearly. In temperate regions, this falls to four to six months. Warm days and cool nights help trigger flower buds. Day length does not control this process.

Full sun gives the best growth and flower display. Shade reduces both, as do cool, wet growing conditions. Keep soil moist, but allow excess water to drain. Sandy, loamy, and clay soils can all suit it. Avoid salty, waterlogged, or very stony ground. A soil pH of 6–8 suits it best. PFAF lists USDA zones 10–12 for outdoor hardiness. Short spells of intense heat need not harm the plant. Cuttings and layering offer ways to raise new plants. Seed offers less reliable results because yields and viability are low.

People use the flowers for adornment, ceremonies, and scented baths. Flower extracts supply fragrance for perfumes, soaps, and cosmetics. The flowers also flavour tea, while extracts serve as food additives. Traditional remedies use flowers, leaves, and oil for several complaints. These reported uses do not establish medical benefit. Both plant references report no known hazards. That statement does not establish safety for every use.