Buzzy Giant Sunflower ‘Giganteus’ Seeds 4g
Overview
Buzzy Giant Sunflower ‘Giganteus’ Seeds 4g is supplied for home growing. Giant Sunflower ‘Giganteus’ (Helianthus annuus) is a spectacular annual sunflower that can reach an impressive height of approximately 250 cm. Each tall, sturdy stem produces a large, eye-catching flower head, making it a striking choice for sunny borders, the back of flower beds and wildlife-friendly gardens. After flowering, the seed heads can be left in place to provide a valuable natural food source for garden birds during autumn and winter.
Key Features
- Impressive giant sunflower reaching up to approximately 250 cm.
- Produces one large flower head per stem.
- Excellent statement plant for sunny gardens.
- Ideal for the back of borders and flower beds.
- Seeds are attractive to garden birds.
- Easy-to-grow annual.
- Long flowering season from July to October.
- Indoors / Under Glass: Late March–mid-April
- Outdoors: Mid-April–mid-June
- Planting Out.
- Giant Sunflower ‘Giganteus’ flowers from approximately July through October, producing large, dramatic blooms on tall stems.
- Plant towards the back of borders so shorter plants are not shaded.
- Leave mature seed heads on the plants if you would like to provide food for garden birds.
- Children can enjoy growing this variety and measuring its impressive height through the season.
- Best Uses.
- Ideal for the back of sunny borders, wildlife gardens and areas where a tall, dramatic focal point is wanted. Its impressive height also makes it a fun choice for family gardens and children’s growing projects.
- ‘Giganteus’ is a classic giant sunflower that delivers dramatic height, huge summer flowers and added wildlife value. Its towering stems make an unforgettable garden feature, while the mature seeds provide a welcome food source for birds later in the year.
Sowing Instructions
- When to Sow.
- For an early start, sow under glass from late March to mid-April.
- Alternatively, sow outdoors in a seedbed from mid-April to mid-June.
- Transplant young plants after approximately 5–6 weeks, once they are strong enough to handle and outdoor conditions are suitable.
Growing Conditions and Care
- Position: Sun
- Keep the soil or compost evenly moist while the seeds germinate and the young plants establish.
- Because ‘Giganteus’ grows very tall, choose its final position carefully and allow plenty of room for the plants to develop.
- Position & Care.
- Grow in a sunny, open position. Tall sunflowers benefit from a sheltered site or support in exposed gardens, particularly as the flower heads become larger and heavier.
- Water regularly during dry periods, especially while the plants are establishing and developing flower heads.
- Choose a sunny position with plenty of vertical space.
- Water young plants regularly while they establish.
- Provide support if growing in an exposed or windy position.
Flowering and Garden Use
- Flowering Period: July–October
Product Details
- Botanical Name: Helianthus annuus
- Variety: Giganteus
- Common Name: Giant Sunflower
- Plant Type: Annual
- Flower Colour: Yellow
- Height: Approx. 250 cm
- Contents: Approx. 4 g
Browse flower seeds from Mallorn Gardening Supplies for home gardens, allotments and container growing in Ireland.





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