Common Name: gardenia
Type: Broadleaf evergreen
Zone: 8 to 10
Height: 1 to 2 feet
Spread: 2 to 5 feet
Bloom Time: June
Bloom Description: White
Sun: Part shade
Flower: Showy, Fragrant
Leaf: Colorful, Evergreen
Winter hardy to USDA Zones 8-10 where this variegated gardenia may be grown in the garden in humusy, organically rich, acidic, well-drained soils in part shade. Consider raised plantings in areas with heavy clay soil. Water plant soils consistently. Plants appreciate significant humidity year-round. In the St. Louis area, plants should be grown in pots or containers in conservatories or warm rooms. Plants may be taken outside in summer, but should be brought indoors in late summer/early fall for overwintering. As an indoor plant, grow this gardenia in bright light with moderate room temperatures. Water moderately, but do not allow soils to dry out. Prune as needed after flowering to shape. Fertilize as needed from March to August.
Gardenia jasminoides, commonly called common gardenia or cape jasmine, is native to southern China and Japan and is an evergreen shrub with thick, glossy, dark green leaves (to 4” long). It typically grows to 3-6’ tall. It is particularly noted for its extremely fragrant white flowers (to 3” diameter) and is often grown in double-flowered forms. Flowers bloom throughout the year in warm climates where temperatures do not dip below 60 degrees F., but more typically bloom in late spring to early summer in cooler climates in the northern part of its growing range.
Gardenia jasminoides is synonymous with G. augusta and G. grandiflora.
Genus name honors Dr. Alexander Garden (1730-1791).
Specific epithet means like jasmine.
‘Radicans Variegata’ is a low-growing ground cover form with horizontal branching. It grows to only 1-2’ tall and spreads to 2-4’ wide. It features very fragrant but small white flowers (to 1” diameter) and small oval gray-green leaves edged with creamy white.
Watch for scale, white flies, aphids, mealybugs and spider mites. Powdery mildew, leaf spots, dieback, anthracnose, sooty mold and canker may occur. Leaves may yellow (chlorosis) if plant soils lose acidity. Buds may fall and/or leaf tips may blacken if temperatures or soil moisture fluctuate too much.