Indoor Jasmine Care: The Complete Guide to Blooming

Jasmine (Jasminum polyanthum) Reality Check

Jasmine is not an easy houseplant. Leaf drop after moving indoors is classic—light intensity drops 90%+ even at a sunny window.

Essential Requirements

Light

• Bright light, protected from hot midday sun.
• East window ideal. Summer outdoors on porch excellent.

Air & Temperature

• Fresh air circulation critical—open window or fan.
• 60-75°F (15-24°C) optimal; tolerates 50-85°F (10-29°C).

Watering

• Thorough watering when top 1/2 inch dry.
• Zero tolerance for lapses—leaves discolor fast if too wet or too dry.

Potting

• Rarely needs repotting. Must be pot-bound to bloom.
• Repot ONLY if soil dries in 2-3 days after watering.

Fertilizer

1-2-1 ratio at half strength, ONLY during active new growth.

Humidity

Helps but not essential if watering is precise.

Pests: Spider Mite Magnet

• Check leaf undersides weekly.
• Treat promptly with soap spray.
• Few jasmines escape periodic infestations.

The Blooming Regimen (January Flowers)

1. Post-bloom (late winter): Cut back by 1/2. Pinch new growth for fullness until August.
2. August: Stop pinching.
3. October (6-8 weeks): Cool 40-50°F (4-10°C), COMPLETE darkness at night, bright days. Soil slightly dry.
4. After dark period: Normal temps, sunny window. Buds set.
5. Winter: No fertilizer. Prune by 1/2 in late winter/early spring.

Flowers only on new growth. This regimen is demanding—partial compliance yields partial bloom.

Propagation

Tip cuttings (2-3 leaf sets) in damp peat mix, plastic tent, warm (65°F+), bright indirect light. 6-8 weeks for roots.

If the full regimen is impossible, focus on light, water, and mite control. A healthy non-blooming jasmine is better than a dead one.