Sweet Corn STOWELL'S EVERGREEN 30 SEEDS £1.50 Quantity: at £1.50 each Add To Basket Tall growing variety with large cobs. The kernels are creamy-white and very sweet. Sowing instructions: Sow from the middle of May when the soil temperature is above 12 ºC. Sow the seeds in rows 60-80 cm apart with 20-25 cm between the seeds. Average contents: 30 seeds.