Sweet Pea Flowers: Colours, Scent, and How to Get More Blooms
Sweet pea flowers are loved for their beautiful ruffled petals, rich colours, and unforgettable fragrance. A classic feature of UK gardens and allotments, sweet peas are especially popular for cut flower displays and for climbing over arches, trellis, and fences.
Keter Manor Outdoor Apex Double Door Garden Storage Shed (6 x 8ft)
A durable and stylish beige and brown garden storage shed perfect for storing garden tools, equipment, bikes, and outdoor essentials. Weather-resistant, low maintenance, and ideal for any garden or allotment setup.
🌱 Compost & Soil Improvers
Give your garden beds a boost before winter with compost and organic matter.
Shop Compost & Soil Improvers
🌿 Autumn Plant Feed & Fertiliser
Prepare your soil for autumn planting with suitable fertilisers and soil nutrients.
Browse Garden Fertilisers
🥬 Seed Trays & Propagation Kits
Keep growing through autumn by starting suitable hardy crops under cover.
Shop Seed Trays
⭐ Recommended Products — Sweet Peas & Growing Essentials
Sweet peas are fragrant classics that bring colour and scent to summer gardens — and starting them right gives the best blooms.
• Sweet Pea Seed Mix (Classic & Fragrant Varieties)
A selection of popular and scented sweet pea seeds — perfect for sowing early under cover to produce tall, blooming plants later.
👉 Click here to see top options
• Sweet Pea Support Canes & Twine Kit
Strong bamboo canes with garden twine to train your sweet peas up for maximum display and air circulation.
👉 Click here to see top options
• Seed & Cutting Propagation Compost
Fine, free-draining compost ideal for sowing sweet peas — helps seedlings get a strong start with healthy roots.
👉 Click here to see top options
• Sweet Pea Grow Bags / Small Containers
Great for sowing seeds in pots, cold frames, or greenhouse benches before planting out — gives easy management of early seedlings.
👉 Click here to see top options
• Grow Lights or Heat Mat for Seed Starting
Provides extra light and warmth during early sowing if your natural light is limited — helps sweet peas germinate reliably.
👉 Click here to see top options
This guide focuses on sweet pea flowers themselves—what they look like, how long they last, and how to encourage the best possible display.
🌸 What Are Sweet Pea Flowers?
Sweet pea flowers are produced by the annual climbing plant Lathyrus odoratus. Each flower grows on a long stem and has a distinctive butterfly-like shape with softly frilled petals.
They are grown mainly for:
- Strong, sweet fragrance
- Cut flower arrangements
- Decorative vertical displays
- Pollinator-friendly planting
🎨 Sweet Pea Flower Colours
Sweet pea flowers come in a wide range of colours, including:
- Pale pink to deep rose
- Lavender, lilac, and purple
- Pure white and creamy shades
- Red, maroon, and burgundy
- Blue and mauve tones
- Bi-colour and picotee varieties
Some varieties are bred for strong scent, while others are chosen for long stems and bold colour.
👃 Fragrance of Sweet Pea Flowers
The fragrance is what truly makes sweet peas special.
- Most varieties have a sweet, honey-like scent
- Heirloom varieties are often the most strongly scented
- Scent is strongest in warm weather and early mornings
Planting several varieties together increases the overall fragrance.
⏳ How Long Sweet Pea Flowers Last
On the Plant
- Flowers appear from late spring
- With regular picking, plants can flower all summer
- Allowing seed pods to form will stop flowering quickly
In a Vase
- Sweet pea flowers usually last 3–5 days
- Cut early in the morning for best vase life
- Change water daily to help flowers last longer
✂️ How to Get More Sweet Pea Flowers
To keep sweet peas flowering heavily:
- Pick flowers every 2–3 days
- Never allow seed pods to develop
- Keep soil consistently moist
- Feed weekly with a high-potash fertiliser
- Grow plants in full sun
The more flowers you pick, the more the plant produces.
🌼 Best Uses for Sweet Pea Flowers
- Cut flower arrangements indoors
- Garden arches and walkways
- Cottage garden borders
- Containers with strong supports
- Pollinator-friendly gardens
Sweet peas pair beautifully with other summer flowers such as roses and cosmos.
⚠️ Important Safety Note
Sweet pea flowers are ornamental only and not edible.
They should not be confused with edible peas or beans.
Final Thoughts
Sweet pea flowers offer a perfect mix of beauty, fragrance, and abundance. With simple care and regular picking, they’ll reward you with months of colour and scent in both the garden and the home.