How to Grow Verbena bonariensis
Verbena bonariensis
Plant verbena bonariensis in the sunniest spot you have, in well-drained soil — it thrives even in poor ground. Leave the tall stems standing over winter for structure and crown protection, then cut to the ground in spring when new basal growth appears. It self-seeds freely in UK gardens, so you will often get new plants for free. Mulch crowns with gravel or bark in autumn if your site is cold or exposed.
Yearly Lifecycle
Care Essentials
Rarely needed. Thrives in poor to moderate soil.
Watch For
- Powdery mildew
- Aphids
Companions
Grasses, Salvia, Echinacea, Cosmos
Track your Verbena bonariensis care schedule — pruning, feeding, and seasonal tasks
Start planning freeCare Requirements
☀️ Light
Full sun for best flowering
Full sun is essential. Verbena bonariensis becomes leggy and flowers poorly in shade. Choose the sunniest border position available.
💧 Watering
Drought-tolerant; needs good drainage
Drought-tolerant once established. Water new plants until settled, then leave alone. Excellent drainage is more important than regular watering.
🌱 Fertilizing
Rarely needed; poor soil is fine
Rarely needed. Thrives in poor to moderate soil. Overfeeding produces lush foliage at the expense of flowers.
✂️ Pruning
Leave over winter; cut back in spring
Leave stems standing over winter for structure and to protect the crown. Cut to ground level in spring when new basal growth appears.
🍂 Mulching
Dry mulch in autumn in cold areas
Mulch crowns with dry material (gravel or bark) in autumn in cold or exposed areas to protect against winter wet.
Growing Tips
Sun and drainage are key
Full sun and sharp drainage are the two essentials. Verbena bonariensis becomes leggy and flowers poorly in shade, and wet winter soil kills crowns more reliably than frost.
Leave stems over winter
Leave stems standing through winter — they look architectural with frost and protect the crown from cold and wet. Cut back in spring once you see new basal shoots.
Avoid feeding
Do not feed. This plant flowers best on poor to moderate soil. Overfeeding produces lush foliage at the expense of the airy flower heads that make it so useful.
Allow self-seeding
Let some seed heads stand to self-sow — seedlings appear reliably in UK gardens and act as insurance against winter losses.
Pests & Diseases
Pest Aphids
Identification: Clusters of green or black insects on shoot tips and flower heads; sticky honeydew
- Blast off with a jet of water
- Encourage ladybirds, lacewings and hoverflies — the flowers already attract many beneficial insects
- Fatty acid spray for heavy infestations
Pest Slugs and Snails
Identification: Irregular holes in young basal leaves; slime trails; new shoots eaten at ground level
- Copper tape around crowns in early spring
- Beer traps or hand-picking at dusk
- Encourage hedgehogs and ground beetles
- Ferric phosphate slug pellets around emerging growth
Disease Powdery Mildew Erysiphe spp.
Symptoms: White powdery coating on lower leaves; affected leaves may yellow and drop; upper growth usually unaffected
Treatment: Remove badly affected lower leaves. Improve air circulation.
Prevention: Space plants well. Avoid overcrowding at the base. Water at the roots.
Disease Root Rot Pythium spp.
Symptoms: Wilting despite moist soil; blackened crown and roots; plant fails to emerge in spring
Treatment: Remove and destroy affected plants. Improve drainage before replanting.
Prevention: Plant in well-drained soil. Add grit to heavy ground. Mulch crowns with dry material in winter.
Popular Varieties
Lollipop, Meteor Shower
Log Verbena bonariensis in your garden — track growth, care, and harvests year after year
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