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.

Standard Shipping (UK)
Free on orders £65; £3.95 under £65
Estimated 2–4 business days*

Next-Day Shipping (UK)
£5.95 for next business day†

*Orders before 12 pm GMT. Weekends & holidays ship next working day.
†Order by 12 pm GMT; weekends & holidays ship next working day.

During Peak Period, these timelines may be affect by up to 48 hours.

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