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RHS ONION Redspark F1

An award winning red onion producing uniform, globe shaped bulbs with excellent colour, mild flavour and great storage ability.

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Original price £3.79
Original price £3.79 - Original price £3.79
Original price £3.79
Current price £3.22
£3.22 - £3.22
Current price £3.22

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RHS Onion Redspark F1 Seeds produce uniform, medium sized globe onions with striking deep red skins and excellent internal colour. This high performing F1 hybrid variety is bred for reliability and consistency, delivering attractive, firm bulbs that perform well across a wide range of UK growing conditions.

Redspark F1 develops rounded bulbs with crisp white flesh and a mild yet satisfying flavour, making it a versatile choice for both fresh use and cooking. The strong skins help protect the bulbs during lifting and curing, while the variety’s natural resistance to mildew supports healthy crops and reliable yields.

One of the standout features of Redspark F1 is its excellent storage potential. Once harvested and properly dried, bulbs store well, allowing you to enjoy home grown red onions well beyond the growing season.

Awarded the RHS Award of Garden Merit, this variety has been recognised for its strong performance, uniformity and dependable results. It is suitable for sowing indoors for an earlier start or directly outdoors in spring, making it a flexible option for allotments and kitchen gardens.

Part of the trusted seed range produced by Mr Fothergill’s Seeds in partnership with the Royal Horticultural Society, these seeds are packed in the UK and meet strict quality standards.

200 seeds, approx

  • F1 hybrid red onion with uniform globe shaped bulbs
  • Attractive deep red skins with good internal colour
  • Mild flavour suitable for salads and cooking
  • Good resistance to mildew
  • Stores very well once cured
  • Suitable for indoor or outdoor sowing
  • RHS Award of Garden Merit winner
  • Produced by Mr Fothergill’s Seeds in partnership with the RHS

Redspark F1 is a brilliant all round red onion. It is reliable, easy to grow and produces consistently good bulbs that look great and store well. A strong choice for gardeners who want dependable results from seed.

Planting calendar

Plan your growing season with this handy guide

Sow under cover / Plant indoors
Direct sow / Plant outdoors
Flowers / Harvest
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sow under cover / Plant indoors
Direct sow / Plant outdoors
Flowers / Harvest

About Mr Fothergill's

Mr Fothergill's is a much loved British seed brand with a simple belief at its heart, gardening has the power to enrich everyday life and deepen our connection with nature. What began in 1978 in the converted stable block of Lillie Langtry’s former Newmarket home has grown into one of the most trusted names in seeds and plants, with a reputation built on quality, innovation and genuine care for gardeners.

From its home in Kentford, Newmarket, the company has evolved from a small family business into a modern seed specialist, with purpose built offices, a seed testing laboratory, packing and storage facilities, and extensive trial grounds and growing sites. Every season, seeds and plants are carefully selected, tested and packed so that gardeners in the UK and in more than 30 countries can sow with confidence.

For over 40 years, Mr Fothergill’s has supplied garden centres, shops and home gardeners with an extensive range of vegetable and flower seeds, young plants and useful gardening essentials. Whether you are working with a balcony, courtyard, back garden or full allotment, and whether you are a complete beginner or a seasoned grower, the brand’s aim is the same, to inspire you, to offer reliable products at great value, and to give you the confidence to grow a beautiful space and delicious homegrown food.

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