Miniature Rose Blooms Turning Brown: Thrips or Water on Petals

Second Flush Blooms Browning on Mini Roses

Mini roses' second bloom round has brownish petals. No Japanese beetles seen.

Two Causes

1. Thrips: Microscopic insects suck petal juices → brown patches. Inspect blooms closely.
2. Water on petals: Thin petals rot if wet. Overhead watering or rain causes browning.

Action

• If thrips: use thrips-specific spray (spinosad, neem).
• Water at base only; avoid wetting flowers.