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How to Grow Scallions / Spring Onions
Index
- Sowing Instructions
- Crop Maintenance
- How to Harvest
- Storage
- Pests & Diseases
Sowing Instructions
- Sowing Time: From March until early summer
- Stagger sowing times for a continual harvest
- Sow in rows every two weeks
- Sowing Location: Sow direct into rows
- Can be sown under cover from Early February using a garden cloche or green house
- Some varieties can be sown outdoors in autumn & over wintered using a garden cloche
- To sow: Make drills 1cm deep & space drills 15cm apart
- Sow seeds very thinly & thin out once seedlings are large enough to handle
- Spacing is important. Close spacing for smaller onions and wider spacing for larger onions
Crop Maintenance
- Dispose of all thinings to avoid attracting the onion fly
- Water if the soil is dry and cover with soil
- Hoe regularly between the rows as weeds can grow quickly around onion plants
- A sunny, open site is ideal
- Soil should be light, and well drained while high in fertility, especailly nitrogen
- Prepare soil the previous season by working in some well rotted farm yard manure into your soil
- Remove any large and smaller stones, weeds and weed roots while preparing soil
- It is recommended that you perform a soil fertility test at least once
- Lime the soil if your soil is acidic, use carbonate of lime, and apply approx 150g per metre squared
- Keep the soil weed free
- Apply a general fertilizer such as grow more or poultry manure
- Apply approx 35g of fertilizer per metre squared and rake into surface soil
- If your soil is a heavy clay, it is recommended that you improve your soils drainage
- Alternatively place a small amount of horticultural grit beneath seeds prior to sowing
Harvesting your Spring Onion Crops
- Quick to mature, scallions can be ready for harvest three months after sowing
- Harvest when leaves are deep green and standing upright
- You can first harvest the leaves by removing with a scissors. Remove only one leaf per plant at a time and the bulb will continue grow
- You can later harvest the entire plant by lifting the bulbs using a garden fork
- Be careful when lifting as pulling one bulb will generally bring the surrounding bulbs with it
- Spring onions can be eating directly after harvest
How to Store Spring Onions & Scallions
- Consume any damaged bulbs first
- Short term storage in the fridge
- Can be stored for up to 7 months in a cool dry place
- You can also tie up your bulbs using their own stems or some cord
Pests & Diseases
- Bird attack is most likely the biggest threat to spring onions
- Netting should be used to protect against birds that pull up roots
- Other pests and diseases include: Onion fly, root fly, bolting and downy mildew
- Plant spring onions near carrots to repel the carrot fly
- Plant spring onions near tomatoes