Herb WELSH ONION 300 SEEDS £1.50 Quantity: at £1.50 each Add To Basket Allium fistulosum Hardy perennial that produces larger leaves than chives but is used in a similar way. Can also be used as a spring onion. Sowing instructions: Sow in spring for summer harvest or in August for early harvest the following year. Sow in rows 40 cm apart and thin plants in the row to 10 cm. Average contents: 300 seeds.