Pest identification
What's eating my sidebells penstemon?
Aphids
Signs: Soft colonies on flower spikes and new growth; honeydew and minor bud distortion.
Control: Spray with water or insecticidal soap; encourage natural predators such as lacewings.
Deer
Signs: Distinctive one-sided flower spikes browsed; most problematic in suburban gardens near open hillsides.
Control: Apply scent-based deer repellent; wire caging during bloom protects the ornamental display.
Slugs & snails
Signs: Holes in lower leaves and seedlings; most common when extra irrigation creates moist soil.
Control: Reduce irrigation frequency; use iron phosphate bait; hand-pick at night.
Keep sidebells penstemon pest-free
Healthy plants resist pests best. Get the basics right:
Sidebells Penstemon pests — FAQ
What is eating my sidebells penstemon?
Sidebells Penstemon (Penstemon secundiflorus) is a drought-adapted Rocky Mountain native seldom seriously troubled by pests. Aphids are the most common visitor on the flower spikes, deer may browse the distinctive one-sided flower racemes, and slugs can damage seedlings in irrigation-heavy gardens. Sharp drainage and full sun are the best preventive measures.
How do I get rid of aphids on sidebells penstemon?
Soft colonies on flower spikes and new growth; honeydew and minor bud distortion. Spray with water or insecticidal soap; encourage natural predators such as lacewings.
How do I get rid of deer on sidebells penstemon?
Distinctive one-sided flower spikes browsed; most problematic in suburban gardens near open hillsides. Apply scent-based deer repellent; wire caging during bloom protects the ornamental display.
How do I get rid of slugs & snails on sidebells penstemon?
Holes in lower leaves and seedlings; most common when extra irrigation creates moist soil. Reduce irrigation frequency; use iron phosphate bait; hand-pick at night.