Water deeply and regularly during warm weather, allowing the top 1–2 inches of soil to dry slightly between waterings. Containers may need frequent summer watering. Reduce watering in winter; avoid standing water.
Jasminum sambac ‘Grand Duke of Tuscany’ is a compact tropical jasmine with glossy leaves and intensely fragrant, fully double white flowers resembling miniature roses.
Light: Morning sun with afternoon shade in Phoenix; avoid intense western exposure and reflected heat. Deep shade reduces flowering.
Water: Water deeply and regularly during warm weather, allowing the top 1–2 inches of soil to dry slightly between waterings. Containers may need frequent summer watering. Reduce watering in winter; avoid standing water.
Soil: Rich, well-drained soil amended with organic matter; slightly acidic to neutral preferred. Use a freely draining potting mix for containers.
Mature size: Typically 3–5 feet tall and 2–4 feet wide; may grow larger in frost-free, favorable conditions.
Bloom: Intermittent flushes from late spring through fall, strongest during warm weather; extreme heat or moisture stress can interrupt flowering.
Evergreen / deciduous: Evergreen in warm, protected locations; may lose leaves or suffer stem dieback during Zone 9b freezes.
Growth rate: Slow to moderate; generally slower than single-flowered Arabian jasmine.