Multiple Perennials with Brown Spots: Spider Mites Suspected

Shasta daisy, Russian sage, lamb's ear, snapdragons, and others show small brown spots, leaf curling, and holes in a full-sun, sandy loam bed. No insects seen.

Likely Spider Mites

Tiny, often invisible to naked eye. Feed on leaf undersides, causing stippling (brown spots), curling, and leaf death. Thrive in hot, dry, dusty conditions.

Control

• Water blast: Strong spray on leaf undersides every few days.
• Insecticidal soap or horticultural oil: Thorough coverage, repeat weekly.
• Predatory mites: Release Phytoseiulus persimilis for biological control.

If Not Mites

Could be fungal rust or leaf spot—harder to control. Improve air circulation, avoid overhead water, apply fungicide if needed.

Start with mite treatment; monitor response.