LETTUCE TROCADERO 7GR. SUPERBOL: Variety that produces a round, slightly flattened, full head. Rounded yellow-green leaves with a bland flavor hold up well in transit. Sow: in nursery prepared with sand and peat or sow directly to field. Transplant: To 50 cm. rows, leaving 30 cm. between plants within the same row. Fertilize with 1-1-1 mixture.