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Onion Mammoth Improved
Mammoth Improved Onion is the perfect exhibition onion because it can be grown to over 2.5kg in weight, and has a lovely uniform shape to the bulb. It also has a lovely sweet taste. Sow from late December to late February at 15°C and do not overwater. Harden off seedlings for planting outdoor from mid-April.
One of the most popular crops for the gardener, onions are a huge must for any allotment holder or for the gardener who has their own little vegetable garden at home, as they are so versatile and can be used for a variety of different things.
Product Part Number: 18105
When to sow
When to Sow Mammoth Improved Onion Seeds
December to April
Where to Sow
Sow underglass in pots or seed trays , sow seed on the surface of seed sowing compost and lightly cover with a sprinkling or vermiculite or compost , and place at a temperature of 14°C. For smaller onions outdoor sowings can be made in April , sow seed thinly in shallow drills 1.5cm (1/2in) deep, with rows spaced 30cm (12in) apart.
What to do next
Seedlings can be pricked out into individual pots or modular trays. Move plants to a cold frame in April to gradually harden off before planting outside 30-45cm (12-18in) apart between the plants and 45cm(18in) between the rows. Thin outdoor sowings to 15-30cm (6-12in) apart.
August to September
Onions require a very fertile soil. Dig the onion bed in the autumn, incorporating manure or specialist onion fertilizer.
Antibacterial and antiseptic properties, due to their beneficial sulphur compound, they are also packed full of anti-oxidant. Also high in Vitamin C, Calcium and Iron.