Thrips Damage on Pope Paul II Roses: Brown Petal Edges and Failed Opening

Two Pope Paul II roses in Atlanta had beautiful first blooms, but subsequent buds stayed closed, were tinged brown, and didn't open fully. Plants were fertilized and had plenty of sun.

Thrips

Thrips are tiny insects that prefer pastel-colored roses (Pope Paul II is a favorite). They suck nutrients from petals, causing brown, dead spots and preventing proper opening.

Control

Apply a rose insecticide labeled for thrips, focusing on cane tips and new growth. Remove and discard all browned flowers. Also spray the soil at the base, where thrips pupate.