When to plant English Lavender?
Best month and method — Lavandula angustifolia 'Hidcote'
Plant your english Lavender in April, May and September — the optimal month is usually May.
You're in the planting season right now — a good moment to start.

Spacing
40 cm
≈ 6 plants
For an X m² border, calculate: X × 6 plants.
Step by step: plant english Lavender
English lavender 'Hidcote' thrives in full sun and demands excellent drainage, making it ideal for sandy, chalky, or loamy soils. Before planting, work in horticultural grit or sharp sand if your soil is heavy or clay-based—waterlogged roots will kill lavender faster than cold weather. Choose a spot that receives at least six hours of direct sunlight daily; shade leads to leggy growth and poor flowering. Plant in April, May, or September when the soil is workable and temperatures are moderate. Autumn planting gives roots time to establish before winter, but spring planting works well if you can water during dry spells in the first summer. Dig a hole slightly larger than the root ball and set the plant at the same depth it sat in its pot—burying the stem too deeply invites rot. Space plants 40 cm apart to allow air circulation, which helps prevent fungal disease. After planting, firm the soil gently around the base and water in well to settle roots. Despite lavender's low water needs once established, new plants need regular watering for the first six to eight weeks until roots spread. After that, water only during prolonged drought. Apply a 2–3 cm layer of gravel or grit mulch around the base—this reflects light, keeps the neck of the plant dry, and suppresses weeds. Avoid organic mulches like compost or bark, which retain moisture and can cause stem rot. No staking is needed; 'Hidcote' forms a compact, sturdy mound naturally.