March-June in flat trenches 6in (15cm) wide, and 2in (5cm) deep. Plant seeds in a zig-zag fashion along the middle of the trench, allowing 3in (7.5cm) between them. Fill trenches with soil and gently firm down. Where more than one row of peas is required, allow 3ft (90cm) between rows. Harvest: June onwards, gathering peas just before they are needed to ensure the very best flavour. Pick regularly.