Controlling Aphids and Whiteflies on Hanging Basket Petunias

Green flies and whiteflies coating petunia leaves are almost certainly aphids and whiteflies—sap-sucking insects that weaken plants over time. Even if damage isn't visible yet, they'll stunt growth and reduce flowering if ignored. The solution is straightforward: insecticidal soap.

Treatment Steps

1. Take the basket down and spray thoroughly, coating leaf undersides where pests hide.
2. Repeat in 10 days to catch newly hatched nymphs.
3. Apply in early morning or evening—midday sun can burn wet foliage, and overnight dampness invites fungus.

Insecticidal soap is an organic, low-toxicity option that works on contact. Monitor weekly and re-treat if needed. Healthy, well-watered petunias in full sun are less prone to infestations. Don't let "gross" become damaging—act early.