Description

A richly coloured and highly fragrant variety that’s a favourite for cut flower displays. Well-suited to UK gardens and a rewarding choice for beginners and seasoned sweet pea lovers alike.

Highlights:

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  Harvesting Season: June to September


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  Height & Spread: Up to 180cm height | 30cm spread


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  Position: Full sun | Moist, fertile, well-drained soil


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  Great for: Cut flower gardens, climbing over trellises, fences, or obelisks

Why We Love It:

Sweet Pea ‘Blacknight’ is known for its dramatic, velvety blooms in deep maroon-purple and a powerful, classic scent. These climbing annuals are vigorous and floriferous, making them perfect for adding vertical interest and fragrance to any garden space. Excellent as a cut flower, they’ll reward you with more blooms the more you pick.

Planting & Care Tips:

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  When to Plant: Sow indoors from January to April or directly outdoors from March to May


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  Where to Plant: Sunny, sheltered spot with good support (trellis, netting, or canes)


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  Spacing: 20–25cm apart


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  Care Notes: Water regularly, feed with a high-potash fertiliser during flowering, and pinch out growing tips when plants are 10cm tall to encourage bushiness. Deadhead or pick regularly to promote continuous blooming

The Nunhead Gardener Recommends:

Ideal for planting near seating areas or entrances where you can enjoy their rich fragrance. Combine with other sweet pea varieties for a longer bloom window and colour contrast. Try training up obelisks in large pots for compact, dramatic displays on patios or balconies.

Please note:

Images show how this plant may look at various stages of maturity. The size you choose may look different.