Description
Royal Blue Sweet Peas Seeds (Climbing Type) 6250.
Large, Exceptionally Fragrant Clear Blue Blooms on Tall Twining Vines.
Royal Blue Sweet Pea (Lathyrus odoratus), part of the prized Royal Family series, is considered our finest climbing sweet pea variety. Celebrated for its large, intensely fragrant blossoms in a bright, clear blue, this heirloom climber produces long, sturdy stems that hold flowers well out from the foliage for easy cutting. Self-twining vines grow vigorously up to 180 cm in height, creating a stunning vertical display on fences, obelisks, and trellises from late spring right through to late autumn.
Quick Seed Details
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Product Code: 6250
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Botanical Name: Lathyrus odoratus ‘Royal Blue’
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Type: Heirloom Climbing Annual
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Height: Up to 180 cm
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Plant Spacing: Thin to 10 cm apart
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Light Requirement: Full Sun (Benefits from light mid-afternoon shade in hot summer areas)
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Soil Preference: Deep, rich, sharply well-drained soil
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Germination: 15–20 days (Soaking seeds overnight recommended)
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Seed Depth: 12 mm deep
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Seed Count: Approx. 25–30 seeds per packet (12 seeds per gram)
What you need to know to Plant & Grow
Climbing sweet peas thrive in cool spring temperatures and perform best when direct-sown early in deep, fertile soil.
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Seed Preparation: Soak seeds overnight in room-temperature water prior to planting to soften the tough outer seed coat and encourage faster, uniform germination.
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Outdoor Direct Sowing: Direct sow pre-soaked seeds outdoors in April and early May as soon as the soil becomes workable in spring. Sow seeds 12 mm deep and 5 cm apart. Germination typically takes 15 to 20 days in cool soil.
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Thinning & Support: When seedlings reach 7.5 cm in height, thin them to 10 cm apart. Provide a sturdy trellis, netting, or fence for the self-twining vines to climb.
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Garden Care & Feeding: Keep plants consistently watered throughout the season and feed regularly with a water-soluble fertilizer (such as 20-20-20 or 15-30-15).
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Summer Performance Note: Flowering may naturally slow during peak mid-summer heat, but plants will resume prolific bloom production with the return of cooler, moderate late-summer temperatures.
Why Royal Blue Sweet Peas Seeds belong in Your Garden
If you want classic, intensely fragrant cut flowers held on long stems with rich blue colour, Royal Blue is an unbeatable selection. Its strong climbing habit, outstanding flower size, and extended bloom period make it a premier choice for Canadian gardens and cut-flower borders.
