A glossy, dark green shrub prized for its waxy white, intensely fragrant flowers. In the Phoenix Valley it is a deliberate choice: it needs shade, amended soil and attentive care, but in the right sheltered spot few plants match its scent.
Living with it in the Phoenix Valley
Watering
Follow the shrub schedule in our Landscape Care guide, on the higher-water side. Gardenias want soil that stays evenly moist, never soggy. Sudden swings in water or temperature can make buds drop.
Pruning
Little is needed. Trim straggly branches and spent flowers after the main bloom.
Feeding and soil
Our alkaline soil causes yellow leaves with green veins. Plant in well-amended soil, keep it mulched, and feed with an acid-forming fertilizer made for azaleas and camellias, plus iron as needed. Avoid fertilizing in fall.
Heat and pests
It struggles when temperatures pass 110°F, so shade and shelter matter. Watch for aphids, whiteflies and scale.
How our designers use it
Shaded entries and courtyards
Placed by a front door, window or sitting area, its fragrance can be enjoyed up close.
Containers
A large pot with the right soil mix gives it the acidic, well-drained conditions our native soil cannot, and lets it sit in the best shade.
Lush, shaded plantings
It fits with palms, ferns and other shade-loving plants on north and east sides of the house.
Good to know
Pets
Gardenia is on the ASPCA’s list of plants toxic to dogs, cats and horses, typically causing mild stomach upset.
Around the pool
No thorns and little litter, but it rarely suits a hot, sunny pool deck. A shaded patio pot nearby is a better fit.
