How to Grow Sunflowers in the UK and Where to Order Sunflower Bouquets

At The Blossomist, we’re obsessed with the bright, bold joy that sunflowers bring, whether you’re growing them in your garden or gifting a vibrant bouquet of sunflowers to someone special. These golden blooms are more than just beautiful. They’re a symbol of optimism, happiness, and light - perfect for every celebration.

In this post, we’ll explore how to grow sunflowers in the UK, answer popular questions like when do sunflowers bloom and how long do they last, and share how you can enjoy the best sunflower delivery across the UK, direct from The Blossomist.

How to Grow Sunflowers in the UK

Sunflowers are one of the most cheerful and rewarding flowers to grow, and they're surprisingly easy to cultivate in the UK climate. Here's a simple guide to help you grow your own golden giants at home:

1. When to Sow

Sow sunflower seeds in spring, ideally between April and May, once the risk of frost has passed. You can start them off indoors in pots or sow them directly into well-prepared soil outdoors.

2. Where to Plant

Choose a sunny, sheltered spot in your garden or allotment. Sunflowers love full sun and need protection from strong winds, especially the taller varieties. Make sure there's enough space between plants to allow their roots and stems to grow strong, at least 30-45cm apart.

3. Soil and Pots

Sunflowers prefer well-drained soil that’s rich in organic matter. If you’re growing in pots, choose deep containers and use quality compost. Adding a slow-release fertiliser can help give your seedlings a strong start.

4. Watering and Care

Keep the soil consistently moist, especially during dry spells, but avoid waterlogging. Water at the base of the plant rather than over the leaves. As the plants grow, you may need to stake taller varieties with bamboo canes or garden supports to prevent them from bending or snapping in the wind.

5. Growth and Bloom Time

Sunflowers grow rapidly, blooms typically appear 8-12 weeks after planting. Depending on the variety, they can reach heights of up to 3 metres. Once flowering, they not only brighten your garden but also attract pollinators like bees and butterflies.

6. Harvesting Seeds (Optional)

At the end of the season, allow the flower heads to dry on the stem if you’d like to collect seeds. You can roast them for a snack, save them for next year, or leave them out for birds.

When Do Sunflowers Bloom?

In the UK, sunflowers usually bloom from July to early September, depending on the variety and weather conditions. Their flowering window makes them a summer favourite for gardens and gifting alike.

Here are some of the best Sunflower fields in the UK in our opinion, to see the flowers in all their glory and pick your own of course, a must see and a great day out for the family:

Bignor Sunflower Picking Patch, Sussex (bignorromanvilla.co.uk)

The Patch, Buckinghamshire (thepatchmk.co.uk)

Vine House Farm, Lincolnshire (vinehousefarm.co.uk)

Want instant sunshine in your home? Browse our radiant sunflower bouquets, no watering can needed!

How Long Do Sunflowers Last?

Fresh-cut sunflowers can last 7-10 days in a vase when cared for properly:

Trim the stems at a 45-degree angle
Change the water every 2–3 days
Keep them away from direct heat or fruit bowls
Add some flower food to give them a boost!

Sunflower Gifts That Say It All

Looking for a meaningful, cheerful gift? Sunflowers by post are perfect for:

Birthdays
Thank you gestures
Cheering someone up
Get well soon gifts

Pair them with roses for a show-stopping sunflower and rose bouquet or choose a classic bunch of sunflowers in letterbox or hand-tied styles.

Sunflower Delivery Made Simple

Whether you’re planning ahead or ordering a surprise, The Blossomist makes flower delivery UK sunflowers effortless. Our services include:

Next-day delivery across the UK
Hand-tied sunflowers by post, securely boxed and hydrated with bouquet bag wraps
Stylish packaging and handwritten card options

Still wondering, “where can I buy sunflowers?” We’ve got you. With the best flower delivery UK wide, our curated collection ensures your blooms arrive fresh, on time, and as joyful as a summer’s day.