How to grow lemon verbena
Overview
Lemon verbena is a deciduous shrub grown for its intensely lemon-scented leaves, used fresh or dried in teas, desserts, and potpourri. It thrives in warm, sunny positions with consistent moisture and benefits from regular harvesting to keep it bushy.
Soil Preparation
Prefers well-drained loam or sandy soil with pH 6.0–7.5. Enrich with compost before planting. Improve heavy clay with gypsum and raise beds. Good drainage is essential to avoid root rot.
Growing Guide
Plant lemon verbena in full sun with well-drained soil enriched with compost. Space 1 m apart. Water deeply 2–3 times weekly in warm weather, less in winter. Mulch to retain moisture. Tip-prune regularly from spring to encourage branching. Protect from frost with a thick mulch or move pots indoors.
Care
Feed with a balanced liquid fertiliser every 4–6 weeks during active growth. Prune hard in early spring to remove frost-damaged wood and shape. Mulch around the base to suppress weeds and retain moisture.
Companion Planting
Plant near paths or seating to enjoy fragrance when brushed. Good companions include lavender, rosemary, and thyme. Avoid planting near heavy feeders like corn or tomatoes that may compete for water.
Common Pests & Risks
Watch for whitefly and spider mites, especially in dry weather. Spray with a strong jet of water or use neem oil. Avoid overhead watering to reduce fungal issues.
Harvesting
Harvest leaves from late spring through autumn, picking the top 10–15 cm of stems. Cut just above a leaf node to encourage regrowth. Best flavour in the morning after dew dries.
In the Kitchen
Use fresh leaves in teas, salads, and desserts. Dried leaves keep well for months. Steep 5–10 fresh leaves in hot water for 3–5 minutes. Avoid cooking for long periods as flavour fades.
Troubleshooting
Yellow leaves: overwatering or poor drainage. Brown leaf edges: underwatering or dry air. Whitefly: spray with neem oil weekly. Sparse growth: insufficient sun or lack of pruning. Leaf drop in winter: normal deciduous behaviour.