Pest identification
What's eating my savanna gardenia?
Scale insects
Signs: Bumpy waxy clusters on woody stems; sooty mold colonises honeydew, blocking light and reducing vigour.
Control: Swab with 70% isopropyl alcohol then apply horticultural oil weekly for 4–5 weeks.
Whitefly
Signs: Small white-winged insects on leaf undersides; nymphs drain sap leading to yellowing and leaf drop.
Control: Spray undersides thoroughly with insecticidal soap or neem oil at 5–7 day intervals, three treatments minimum.
Aphids
Signs: Colonies on new growth distort shoot tips; sticky honeydew and sooty mold follow.
Control: Remove with water jet; treat with neem oil or insecticidal soap every 5–7 days.
Keep savanna gardenia pest-free
Healthy plants resist pests best. Get the basics right:
Savanna Gardenia pests — FAQ
What is eating my savanna gardenia?
Savanna Gardenia (Gardenia volkensii), grown as an outdoor tropical, is susceptible to scale insects, whitefly, and aphids — typical of the Gardenia genus. Scale is the most persistent threat, producing honeydew and sooty mold. Treat with rubbing alcohol for scale, and neem oil or insecticidal soap for whitefly and aphids.
How do I get rid of scale insects on savanna gardenia?
Bumpy waxy clusters on woody stems; sooty mold colonises honeydew, blocking light and reducing vigour. Swab with 70% isopropyl alcohol then apply horticultural oil weekly for 4–5 weeks.
How do I get rid of whitefly on savanna gardenia?
Small white-winged insects on leaf undersides; nymphs drain sap leading to yellowing and leaf drop. Spray undersides thoroughly with insecticidal soap or neem oil at 5–7 day intervals, three treatments minimum.
How do I get rid of aphids on savanna gardenia?
Colonies on new growth distort shoot tips; sticky honeydew and sooty mold follow. Remove with water jet; treat with neem oil or insecticidal soap every 5–7 days.