Sow seeds in February in small pots containing free-draining compost or soil. Keep the pots out of the frost, and move the seedlings into larger containers, later in the spring. Alternatively, buy lady lavender plants that have already rooted and established themselves. Line the bottom of the container with crocks or pebbles to allow drainage. One of the main reasons lavender dies is because of overwatering and a lack of drainage.
Water the plants regularly, especially in hot weather, taking care not to allow them to become water-logged. Site the containers in a sunny position. Give a liquid feed as you water it in mid spring and after mid summer. Harvest the lavender and use both the leaves and flower heads for potpourri.
Prune the lavender each year after it has finished flowering, cutting into the woody growth at the base of the flower spikes. Trim it also in mid spring to encourage a bushy growth. Protect the plants from the frost. Replace the lavender every few years when the plants begin to look straggly.