Gardeners everywhere begin to envision vibrant beds and bustling bees as the days lengthen and the earth warms. The sweet pea is one bloom that embodies the essence of early spring. Sweet peas are a timeless flower that should be in every spring garden because of its strong scent, beautiful colours, and effortless charm.
We look at why sweet peas grow well in the spring, how to grow them, and which Yorkshire Seeds varieties are the brightest in this month's "Flower Seed of the Month" feature.
The Reasons Sweet Peas Adore Spring
Early spring is ideal for sweet peas (Lathyrus odoratus), which are cool-season annuals. They're a perfect match for the season for the following reasons:
✅ They Love Cool Soil
Unlike heat-loving blooms, Sweet Peas prefer cooler weather. When sown in February to April, they germinate quickly and produce sturdy young plants ready to flourish once the risk of frost has passed.
✅ Long Days = More Blooms
Sweet Peas are long-day plants, meaning they bloom better with increasing daylight. Spring’s growing sunshine helps them transition from leafy growth to bloom production, just in time to fill your garden with vibrant colour and fragrance.
✅ Perfect for Early Planning
Sowing Sweet Peas early gives them time to establish deep roots, climb higher, and bloom longer—rewarding gardeners with an extended flowering season well into summer.
Our Top Sweet Pea Varieties
Here at Yorkshire Seeds, we pride ourselves on offering high-quality, carefully selected flower seeds. These Sweet Pea varieties are ideal for UK gardens and guaranteed to perform:
‘Old Spice Mix’ – intensely scented heirloom mix
‘Pink Dwarf Sweet Pea Cupid' - delivers a romantic touch
‘Matucana’ – deep purple and maroon classic, famed for its fragrance
🛠️ How to Grow Sweet Peas: Step-by-Step Guide
🌱 1. Soak the Seeds
Sweet Pea seeds have a tough outer shell. Soaking them overnight before sowing helps speed up germination.
🪴 2. Choose Deep Pots or Root Trainers
Sweet Peas develop long taproots, so standard seed trays aren’t ideal. Use deep pots or root trainers for best results.
🌿 3. Provide Support
These are natural climbers! Set up trellises, netting, or canes for them to latch onto as they grow.
🌤️ 4. Harden Off
Before transplanting outdoors, acclimate your plants by hardening them off—gradually introducing them to outdoor conditions over 7–10 days.
✂️ 5. Pinch for Bushier Growth
Once seedlings reach about 4 inches tall, pinch out the tips to encourage branching and more flowering stems.
✂️ 6. Keep Picking!
The more you pick, the more they bloom. Sweet Peas respond beautifully to regular harvesting.
🌼 Where to Grow Sweet Peas
Sweet Peas are wonderfully versatile and can be grown in:
Borders and beds
Containers and pots (with support)
Along fences or arches
Raised beds or garden edges
They’re particularly effective in cottage garden settings, climbing obelisks, or trailing over rustic trellises.
🐝 Wildlife Benefits
Sweet Peas are not just pretty—they're also pollinator-friendly. Their flowers attract bees, hoverflies, and even some early butterflies, helping to boost your garden’s biodiversity.