Spring Onion WHITE LISBON 200 seeds £1.70 Quantity: at £1.70 each Add To Basket Spring onion. Forms a long white stem with little bulbing. The leaves are upright with a fresh green colour. Sow seeds from February onwards 15 mm deep in rows 15-20 cm apart. Repeat sowing every 3 weeks for continuous supply. Keep weed free and well watered.