How to Get Jasmine Polyanthum to Flower

About Jasmine Polyanthum

Also called winter jasmine or pink jasmine, Jasminum polyanthum produces fragrant winter blooms. Grows outdoors in USDA zones 9–10; elsewhere, it's a houseplant. Key to flowering: 4–6 weeks at 40–60°F.

Outdoor Culture

Step 1: Light Conditions

Partial sun, filtered sun, or bright shade (4 hrs/day). Avoid full summer sun in zones 9–10—causes leaf burn/drop, diverting energy from flowering.

Step 2: Soil and Water

Well-draining, compost-rich soil. Water regularly but avoid waterlogging.

Step 3: Fertilize for Buds

High-phosphorus fertilizer (15-30-15) every 2–3 weeks during growing season to encourage flower buds.

Step 4: Frost Protection

Below 40°F: cover with blankets, sheets, burlap, or cardboard box. Frost-killed plants rarely bloom that season.

Indoor Culture

Step 1: Potting Mix

Well-draining, fertile all-purpose potting soil.

Step 2: Summer Placement

Outdoors in summer or bright indoor spot. Avoid prolonged intense summer sun—damages leaves.

Step 3: Fertilize Same as Outdoor

High-phosphorus (15-30-15) every 2–3 weeks in growing season.

Step 4: Cool Treatment for Blooms

4–6 weeks before desired bloom, move to 40–60°F with filtered light (screened porch, windowed garage, unheated room). Cool temps trigger bud formation.