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Gardenia Jasminoides (Cape Jasmine)

Cape Jasmine, Common Gardenia, Gardenia augusta, Gardenia florida L., Gardenia grandiflora

Gardenia jasminoides, commonly known as Cape Jasmine, Common Gardenia, Gardenia augusta, Gardenia florida L., or Gardenia grandiflora, is a large evergreen shrub cherished for its exquisite beauty and intense fragrance. This popular plant, native to southern China and Japan, is favored by gardeners and tropical flower enthusiasts for its lush foliage and captivating blooms.


Cape Jasmine is characterized by its thick, lustrous, lance-shaped, dark green leaves and extremely fragrant, white flowers that are about 3 inches (8 cm) across. In warm climates where temperatures remain above 60°F (15°C), Gardenia jasminoides can bloom throughout the year. In cooler climates, it typically blooms from late spring to early summer. This evergreen shrub grows to a height and width of 3-6 feet (90-180 cm), forming a bushy and attractive habit.

Growing Conditions

Gardenia jasminoides thrives in full sun to light shade, preferring consistently moist, acidic, organically rich, and well-drained soils. While it can tolerate full sun, some shade is beneficial during the warmer months to prevent leaf scorch and bud drop. In hot climates, it performs best with morning sun and afternoon shade. In cooler regions, it can handle full sun, particularly if its roots are mulched with organic material to retain moisture and regulate temperature.


This versatile shrub is perfect as a specimen plant and is also useful as a hedge, espalier, or container plant. Its highly fragrant flowers make excellent cut flowers, adding a delightful aroma to indoor spaces.

Pests and Diseases

Gardenia jasminoides can be susceptible to several pests and diseases, including:

  • Powdery Mildew
  • Leaf Spots
  • Dieback
  • Anthracnose
  • Sooty Mold
  • Whiteflies
  • Mealybugs
  • Scales
  • Aphids
  • Spider Mites

To keep your gardenia healthy, monitor for these issues and treat promptly with appropriate measures such as insecticidal soap, neem oil, or fungicides.


  • Deadheading: Regularly remove faded flowers just below the leaf node to encourage continuous blooming.
  • Pruning: Prune and shape your gardenia when it is dormant to promote branching and maintain a compact growth habit.
  • Propagation: Propagate gardenias by seed, greenwood, or semi-hardwood cuttings to produce new plants.


Gardenia jasminoides is toxic to dogs, cats, and horses if ingested. It is essential to place this plant out of reach of pets to prevent accidental poisoning.


Gardenia jasminoides has been recognized for its outstanding qualities, winning the prestigious Award of Garden Merit from the Royal Horticultural Society.

Cultivation Tips

  1. Soil: Ensure the soil is acidic (pH 5.0-6.5), rich in organic matter, and well-draining.
  2. Watering: Keep the soil consistently moist but not waterlogged.
  3. Mulching: Use organic mulch around the base to retain moisture and keep roots cool.
  4. Fertilization: Feed gardenias with a balanced, acid-forming fertilizer during the growing season.
  5. Temperature: Maintain a stable environment with temperatures between 60-75°F (15-24°C).
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