Black Specks on Cut Roses: Insect Frass, Not Current Infestation

Tiny black specks on vase table are insect droppings (frass) from pests that have already left the flowers.

What They Are

Excrement from thrips, aphids, or other insects that fed on the roses before cutting. No live insects remain in the blooms.

Enjoy your flowers—the pests have moved on.

Roses: Preventing Black Spot on Roses: Early Spring Steps for Healthy Foliage; Black Spots on Ohio Siding: Likely Artillery Fungus or Insect Frass—Need Photo; Black Mites with White Spots in Herb Garden: Wait and Monitor; Growing Black Cherry from Seed: Sun Requirements & Zone Suitability; Are There True Black Roses?; Black Walnut Management: Lumber Value vs. Nut Uses; Black Dots on Garden Leaves: Scale Insects, Treat with Horticultural Oil; What Is Bt (Bacillus thuringiensis) and How Does It Control Caterpillars?; Reviving Black-Eyed Susans After Thinning and Fungus: Disease Management and Cultural Fixes; UV Turned On → Black Water: Dead Algae

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