Lettuce FAVOURITE 250 SEEDS £1.70 Quantity: at £1.70 each Add To Basket A lettuce with crisp leaves but not as dense as a real iceberg lettuce. Slow to bolt. Sowing instructions: Sow seeds from February in seed trays and place in light at a temperature of 18°C. Sow in situ from mid April and thin to 35 cm between plants. Growing instructions: Transfer seedlings into modules or pots and transplant into cold frame greenhouse or outdoors a few weeks later. Lettuce requires a fertile moist soil. Planting distance 35x35 cm. Average contents: 250 seeds.