What's eating my longleaf phlox?

Longleaf Phlox (Phlox longifolia) shares the common phlox pest complex — spider mites are the chief threat, particularly in arid western habitats where this native grows. Aphids, phlox plant bugs, and scale insects can also appear. Prompt identification and insecticidal soap treatment early in the season usually prevents serious damage.

Yellow stippling and fine silken webbing on leaf undersides; foliage loses colour and plants look weak and sparse. Spray with insecticidal soap or neem oil every 7–10 days, focusing on leaf undersides; water during dry periods to reduce plant stress.

Sap-sucking colonies on new growth cause curled, yellowing leaves and stunted stems. Knock off with a strong water jet; treat with insecticidal soap or neem oil if populations build; lacewings and ladybirds provide natural control.

Pale speckling and browning of leaves; buds distorted or failing to open. Cut back dead stems in autumn to remove overwintering eggs; apply insecticidal soap in spring when nymphs first appear.