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Plant Dimensions
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Height 60cm/2ft - Spread up to 30cm/12"
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Yield per 1.5cm/5ft row |
2.2kg/5lb |
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Time between sowing and harvesting
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Sowing Seed - 24 - 40 weeks
Depending on Variety
Planting Sets - 20 weeks
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Where to Sow or plant sets
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Outdoors in open ground or very large containers
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Sowing or planting time
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Seeds: March- April -
temperature +10C/50F
Sets: Late September- October or
March-early April
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How to Sow/plant
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Seeds - 12mm/½" deep - very thinly -
in rows 30cm/12" apart or in groups/blocks.
Sets - plant 15cm/6" apart in rows 30cm/12"
apart or in groups/blocks.
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After Germination
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Seeds - Thin seedlings to 2.5cm/1".
Destroy thinnings as soon as possible. Keep the
soil moist but not very wet and weed free.
Sets - Keep the soil moist but
not very wet and weed free.
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Growing on - in Pots
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As above
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Growing on -
in open ground
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Seeds - thin to 10cm/4" apart. Destroy
thinnings as soon as possible. Keep weed free. Water
in dry weather and feed once or twice during the growing
season.
Sets - Keep weed free. Water
in dry weather and feed once or twice during the growing
season.
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Aftercare
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Break off any flower stems which may appear.
Stop watering once the bulbs have swollen to full size and pull back any
covering earth to expose the bulb surface.
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Harvesting
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Once the foliage has turned
yellow and toppled over, leave the bulbs for a further two
weeks to ripen then carefully lift with a fork.
Onions which are not going to be used immediately should be
spread out and left to dry (outside if the weather is
clement or inside if damp) for 7-21 days depending on the
size of the bulbs.. Discard any soft or damaged bulbs.
Onions kept in a cool dry place will keep for up to 6
months.
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