How to grow bay tree
Overview
Bay tree (Laurus nobilis) is a slow-growing evergreen shrub or small tree from the Mediterranean, valued for its aromatic leaves used in cooking. It thrives in part shade with low water once established, and clips well into formal hedges or topiary. A key fact: it is not frost-hardy in cold inland areas and needs protection from severe frosts.
Soil Preparation
Bay tree prefers slightly acidic to neutral soil (pH 6.0–7.5) with good drainage. Amend heavy clay with coarse sand or gypsum, and add well-rotted compost to improve structure. A 5 cm layer of mulch (e.g., bark or straw) helps retain moisture and suppress weeds.
Growing Guide
Plant bay tree in a position with morning sun and afternoon shade, especially in hot climates. It prefers well-drained soil enriched with organic matter; avoid heavy clay or waterlogged sites. Space plants 1–1.5 m apart for a hedge, or 2–3 m for a specimen tree. For pots, use a 30–40 cm diameter container with quality potting mix and ensure drainage holes. Water deeply every 2–3 weeks during dry spells, but allow the soil to dry between waterings.
Sowing
Bay tree is rarely grown from seed; it is slow to germinate (3–6 months) and often variable. Most gardeners buy potted plants or propagate from semi-hardwood cuttings in summer. If sowing, soak seeds in warm water for 24 hours, then sow 1 cm deep in seed-raising mix; keep at 20–25°C.
Care
Feed with a balanced slow-release fertiliser (e.g., 10-10-10) in early spring, and again in late summer if growth is slow. Prune lightly after harvest in late summer to shape and encourage bushy growth; remove dead or crossing branches. For potted plants, repot every 2–3 years into fresh soil.
Companion Planting
Bay tree pairs well with rosemary, lavender, and sage in a herb garden or formal hedge. Avoid planting near vigorous root competitors like eucalyptus or large gum trees, as they may outcompete for moisture.
Common Pests & Risks
Scale insects (especially brown soft scale) and sooty mould are common on bay tree in Australian gardens. Treat with horticultural oil or neem oil in early spring, and prune out heavily infested branches. Avoid overhead watering to reduce mould.
Harvesting
Harvest mature leaves from late spring to autumn, picking individual leaves as needed. For best flavour, dry leaves in a cool, dark place for 1–2 weeks before storing in an airtight jar. Fresh leaves are less aromatic; dried leaves develop the classic bay scent.
In the Kitchen
Bay leaves are used fresh or dried in soups, stews, and sauces; remove before serving as they are tough and bitter. Store dried leaves in an airtight container for up to 1 year. Avoid using fresh leaves in large quantities as they can be overpowering.
Troubleshooting
Yellow leaves: often due to overwatering or poor drainage; reduce watering and improve soil. Brown leaf edges: caused by dry air or salt buildup in pots; mist leaves and flush soil with water. Scale insects: treat with horticultural oil; prune infested branches. Sooty mould: wash off with soapy water and control underlying scale. Leaf drop: from sudden cold or frost; protect with mulch or move pot indoors.