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How to grow iceberg lettuce
Plant the iceberg lettuce six to eight weeks before the last expected spring frost.
Fill the bottom of each cell of the tray with some standard potting soil before you sprinkle a few seeds into each cell. Cover the seeds with with a light layer of potting soil.

(1). Plant iceberg lettuce seeds in a shallow seed tray. Check the seed tray every day, and water the seeds whenever the soil feels dry..
(2). Pat down with your hands the soil to keep it moist. Grow each iceberg lettuce seedling without additional potting soil..
(3). The trays should be placed in a well-ventilated area, and only ever open to 24 hours of sunlight. Iceberg lettuce seeds should be transplanted before the frost, so that the temperatures do not rise too much..
(4). You can do this in the spring or after the frost. Water after there's still water..
Answer:
(1).