We're offering you a Seed Grow Kit Stunning Sunflower for £6.99, saving you up to 59% off Thompson and Morgan's's price of £16.98 (correct as of 19.05.2026).

Stunning Sunflower Seed Grow Kit – Annual Helianthus Variety

Brighten your garden with the classic beauty of sunflowers! This kit features Helianthus annuus, renowned for its tall stems, bold blooms, and easy cultivation. Unlike standard varieties, this mix offers a vibrant palette of colours, adding extra visual interest to your outdoor space.

• Growth Habit: Fast-growing annual; reaches up to 1.5–2m (5–6.5ft) tall depending on conditions.
• Flowering Period: Blooms from mid-summer through early autumn (typically July–September in the UK).
• Mature Size: Expect strong upright stems perfect for cutting or creating a dramatic backdrop in beds and borders.

Growing Guide & Care Instructions

• Sowing Time: Sow seeds indoors from March to April or directly outdoors from April to May after the last frost.
• Sun Requirements: Prefers full sun; choose a sheltered spot for best results.
• Soil Preferences: Thrives in well-drained, moderately fertile soil; avoid waterlogged areas.
• Caring Tips: Water regularly during dry spells. Stake taller plants to prevent wind damage. Deadhead spent blooms to prolong flowering.

Planting & Design Ideas

• Borders & Backdrops: Plant at the back of borders for height and colour.
• Pots & Containers: Compact varieties are suitable for large pots on patios or balconies.
• Companion Plants: Pair with cosmos, zinnias, or marigolds for a pollinator-friendly display.

FAQs

• When is the best time to plant sunflower seeds?
  Sow indoors from March or directly outdoors from late April after frost risk has passed.
• How fast do sunflowers grow?
  Sunflowers are fast growers—expect visible growth within a week of sowing and flowers in as little as 8–12 weeks.
• What type of soil is best?
  A well-drained, moderately fertile soil is ideal. Avoid heavy clay or waterlogged ground for optimal results.