These easy to grow and quick to harvest salad essentials can be eaten either raw or cooked. Spring Onions must be eaten fresh and cannot be stored like other onions - a perfect reason to grow them at home and enjoy fresh from the garden. Sow continuously throughout the growing season and harvest eight weeks after sowing.
Soil and Aspect
Like most onions, Spring Onions prefer a light soil, but there will grow in most soils that are rich in organic matter. Crop rotation helps prevent infection from pests and diseases. They can also be grown in window boxes or planters in a peat free potting mix such as Growlite.
Spring Onions grow best in an open sunny site, but can tolerate some shade.
Sow every three weeks from early Spring to late summer for a continuous crop from spring through to early Autumn. To harvest an early Spring crop sow ‘White Lisbon Winter Hardy’ or any other hardy variety in late summer or early autumn. This crop will overwinter and be ready for picking in early Spring. Sow crops thinly in rows 1cm deep with 10cm between each row.
Water in dry condition and weed during the growing season. Protect overwintering spring onions with a cloche in cold weather - Easy Tunnel would be ideal.
Harvesting and storing
From sowing to harvesting takes around seven to eight weeks. Use a small hand fork to loosen the ground before pulling. Thin out the crop when harvesting, taking out every other plant and leaving the rest to grow on.
Pests and diseases
Onion fly is the main pest, turning the leaves yellow as the bulb is eaten by the maggots eventually killing the plants. Onion eelworm is another major pest killing young plants and damaging older ones by softening the bulbs. Destroy affected plants. Diseases such as onion white rot and onion downy mildew can also affect the plant. This is not a severe problem, however as their lifespan is so short – move to another growing site if symptoms appear.