RHS Onion (Globe) Redspark F1 Seeds

Sow Redspark F1 seeds indoors from February to March or directly outdoors from March to April, once the soil begins to warm. For best results, sow thinly and transplant seedlings when large enough to handle.

Yes. Once fully mature and properly dried, Redspark F1 onions store very well. Their firm bulbs and tight skins make them ideal for keeping through autumn and winter in a cool, dry place.

As an F1 hybrid, Redspark F1 offers greater uniformity, vigour, and reliability than wide open-pollinated varieties. It produces evenly sized bulbs with consistent colour and flavour, making it especially popular with growers looking for dependable results.