When Are Sunflowers in Season? (UK Guide)
Sunflowers are a classic summer flower, and their season is fairly short but spectacular. In the UK, sunflowers are naturally in season from mid-summer to early autumn.
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🌱 Compost & Soil Improvers
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🌿 Autumn Plant Feed & Fertiliser
Prepare your soil for autumn planting with suitable fertilisers and soil nutrients.
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🥬 Seed Trays & Propagation Kits
Keep growing through autumn by starting suitable hardy crops under cover.
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⭐ Recommended Products — Sunflowers & Sunflower Seeds
Sunflowers are bright, cheerful plants that are easy to grow from seed and great for gardens, borders, or kids’ projects.
• Sunflower Seed Collection (Multiple Varieties)
Includes popular types like classic tall giants, dwarf/multi-head varieties, and colourful mixes — great for diverse planting.
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• Sunflower Seed Starter Kit (Trays + Labels + Compost)
A complete beginner-friendly kit with everything you need to sow sunflower seeds indoors or in a cold frame before planting out.
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• Sunflower Support Stakes & Twine Set
Tall varieties often need support — this kit helps keep stems upright as they grow toward the sun.
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• Bird & Wildlife Sunflower Seed Mix
Also great for feeding wild birds later in the season or sowing separate patches to attract wildlife into your garden.
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• Grow Lights / Heat Mat (Optional for Early Sowing)
Boost germination and early growth if you’re starting seeds indoors before outdoor planting is warm enough.
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Here’s exactly when you’ll see them at their best.
🌻 Sunflower Season in the UK
Sunflowers are in season during:
- July to September – peak season
- Late June – early blooms may appear
- Early October – season usually ends
The height of sunflower season is July and August, when plants are fully grown and flowering strongly.
🌼 Sunflowers in Gardens and Allotments
Sunflowers grown outdoors in the UK typically:
- Are sown in spring
- Grow through early summer
- Flower from mid-summer onwards
Most garden sunflowers reach their best display in July and August.
💐 When Are Cut Sunflowers in Season?
Cut sunflowers follow the same natural season:
- July, August, and September are best
- Earlier or later flowers are often imported
- In-season sunflowers last longer and look fresher
Buying cut sunflowers in season gives better quality and value.
🌱 What About Sunflower Seeds?
- Sunflower seeds are available all year round
- Seeds are sown in spring
- Seeds are harvested in late summer to autumn
Seeds being available doesn’t mean flowers are in season.
❄️ Are Sunflowers in Season in Winter?
No. Sunflowers are not in season during winter in the UK.
- Outdoor plants die back after autumn
- Cut sunflowers are not naturally available
- Only dried, artificial, or imported flowers are seen
Sunflowers are firmly a summer-only flower.
🌻 Final Thoughts
In the UK, sunflowers are in season from July to September, with the best displays in July and August. This is the ideal time to enjoy them in gardens, allotments, and as fresh cut flowers.
For the freshest, longest-lasting sunflowers, always choose them in season.