How to Fertilize Gardenia augusta 'Florida'
When Should I Start Feeding My Gardenia?
Your feeding schedule depends on your local climate, since gardenias break dormancy earlier in warmer regions and later where spring frosts linger.
How Often Should I Fertilize My Gardenia?
Feed your Gardenia every two to four weeks during the active growing season, from spring through late summer. Use half-strength liquid fertilizer for container plants and full-strength granular for garden beds.
Taper off in early fall and stop entirely by mid-fall. Gardenias enter a rest period in winter and do not need fertilizer when growth slows.
If you notice yellowing between the leaf veins, your soil pH may be too high. A dose of chelated iron or a soil acidifier can help, but this is a pH issue, not a fertilizer deficiency.
What Is the Best Fertilizer for Gardenia?
Gardenias are acid-loving plants that need a fertilizer designed to lower soil pH. Look for a formula labeled for gardenias, azaleas, or camellias with an NPK ratio around 4-3-4 or 6-4-6. These blends include sulfur and iron, which keep the soil acidic and prevent yellow leaves.
A liquid acid-forming fertilizer is the easiest option for potted gardenias because it delivers nutrients quickly and evenly. Dilute to half the label strength to avoid salt buildup in the container.
For in-ground gardenias, a slow-release granular acid fertilizer applied in early spring gives steady nutrition for several months. Supplement with a liquid feed once a month during peak bloom if flowers seem sparse.
How Do I Fertilize My Gardenia?
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