Onion Spring Matrix Winter Hardy RHS Seeds

 

Onion Spring Matrix Winter Hardy (Allium cepa L.) is a premium variety awarded the RHS Award of Garden Merit for its exceptional winter hardiness, reliable growth, and excellent flavour.

 

This versatile onion produces medium to large, firm bulbs with a sweet, mild taste, perfect for cooking, salads, and storage over the winter months.

 

Designed to withstand cold conditions, Spring Matrix is ideal for overwintering in gardens or cold frames. Its uniform, high-quality bulbs and disease resistance make it suitable for home gardens, allotments, and professional growers seeking reliable yields.

 

Seed Qty: Approx. 250 seeds

 

Sow: February – April (indoors)

Germination: 10 – 14 days

Soil Type: Fertile, well-drained soil with slightly acidic to neutral pH

Height/Spread: 35 – 45 cm / 10 – 15 cm

Harvesting: July – October

Companion Plants: Carrots, Lettuce, Beets

Avoid Planting With: Peas, Beans

 

Sowing Instructions

 

Indoors: Sow seeds in seed trays or small pots filled with fine seed compost from February to April. Cover lightly, keep soil moist, and maintain a temperature of 18–21°C. Once seedlings are large enough, prick out into individual pots or modules.

 

Outdoors: Harden off seedlings after the last frost and plant out in a sunny, sheltered position with fertile, well-drained soil. Space bulbs 10–15 cm apart in rows 30–40 cm apart for optimal growth.

 

Harvesting: Lift onions once tops begin to yellow and dry. Cure in a well-ventilated, dry location before long-term storage.

 

Onion Spring Matrix Winter Hardy RHS is perfect for gardeners seeking a reliable, hardy, and high-quality onion that can withstand cold weather while producing sweet, uniform bulbs. Its RHS-recognised quality ensures consistent results season after season.